Free open source transport network simulation, somewhat inspired by Transport Tycoon. It can be played online through public or private servers, and includes lots of support for mods.
Fediverse address:
@simutrans@fosstodon.org
Free open source transport network simulation, somewhat inspired by Transport Tycoon. It can be played online through public or private servers, and includes lots of support for mods.
Fediverse address:
@simutrans@fosstodon.org
An attempt to provide a user-friendly desktop based on Sway, a popular tiling window manager (compositor) using the modern Wayland graphics stack.
Fediverse address:
@ubuntusway@mas.to
Free open source online project management software, including classic, agile and hybrid management throughout project life cycle.
Fediverse address:
@openproject@fosstodon.org
Free open source self-hostable file storage and collaboration platform. This is the project that Nextcloud was forked from, but the original is still going as its own thing.
Fediverse address:
@ownclouders@mastodon.social
Makes lovely crochet figures based on free open source projects, well known game characters and other subjects.
Fediverse address (main, in French):
@doomyflo@framapiaf.org
Fediverse address (photos, in French):
@Doomyflocrochet@pix.diaspodon.fr
Libre game developer, co-developer of the comedy turn-based strategy Hedgewars, and creator of games and mods for Minetest.
Fediverse address:
@Wuzzy@fosstodon.org
Free open source note taking and to-do app which you can sync online with lots of popular cloud services including Nextcloud. Available for Android, iOS, Linux, Mac and Windows.
Fediverse address:
@joplinapp@mastodon.social
Fundraising, money management and legal status platform for charities, activists and libre projects that want to be transparent about where their money comes from and how it is used.
Fediverse address:
@opencollective@opencollective.com
New project to make a Fediverse alternative to Tumblr. It’s still at a very early pre-Alpha stage, but is making progress.
Fediverse address:
@Swanye@fosstodon.org
Technology writer and journalist, often discussing open standards and copyright, best known for the free software book “Rebel Code”. Moody is also a regular contributor to Techdirt.
Fediverse address:
@glynmoody@mastodon.social
Developer on FOSS gaming projects such as SuperTux Advance, Kyrodian Legends and the Brux game engine.
Fediverse address:
@KelvinShadewing@mastodon.social
Popular managed hosting service for creating your own Mastodon server. Managed hosting means you don’t really need any technical knowledge as the hosting company does all the techy stuff behind the scenes for you (including installation, maintenance, upgrades etc).
Fediverse address:
@mastohost@mastodon.social
Free open source Swift package library to help developers make apps that interact with the Fediverse.
Fediverse address:
@tootsdk@iosdev.space
Videos mostly about technology, especially free open source software, Linux and PC accessories. The videos are a mixture of features, tutorials and news items. There are also some interesting wild card non-technical videos too.
Fediverse address:
@art@tilvids.com
Survival game mod for the Minetest game engine
Fediverse address:
@survivetest@fosstodon.org
Free open source federated blogging platform. The interface and options are minimalist, with the focus on reading text with as few distractions as possible. It’s part of the Fediverse, so you can follow WriteFreely blogs from Mastodon etc. You can host a WriteFreely server yourself, or sign up on an existing server.
Fediverse address (main):
@writefreely@writing.exchange
Fediverse address (blog):
@writefreely@blog.writefreely.org
Sells privacy-friendly FOSS security keys, de-Googled smartphones, Linux laptops etc.
Fediverse address:
@nitrokey@nitrokey.com
Set of specifications and free open source tools to help users get more control over how their phone’s (or computers’s) notifications are handled. There are options for self-hosting notification systems if needed.
Fediverse address:
@unifiedpush@fosstodon.org
Free open source federated events platform, designed to provide a privacy-friendly alternative to Facebook Events. It has been designed for activists and volunteer organisations, but anyone can use it. It’s part of the Fediverse, so you can follow Mobilizon accounts from Mastodon etc.
Fediverse address:
@mobilizon@framapiaf.org
Free open source screenshot app for Linux, Mac and Windows. It does more than just capture the screen, it also includes editing tools and upload features.
Fediverse address:
@flameshot@fosstodon.org
Free open source XMPP messenger app for iPhone, iPad and Mac. It includes support for OMEMO end-to-end encryption.
Fediverse address:
@Monal@fosstodon.org
Version of Linux for smartphones, based on the Alpine Linux distro.
Fediverse address:
@postmarketOS@fosstodon.org
One of the internet’s longest-running news sites about free open source software and software development. Originally founded in 1998 when “LWN” stood for “Linux Weekly News”, but they now cover much more than that, with new items appearing daily.
Fediverse address:
@LWN@fosstodon.org
Photo sharing network on the Fediverse, this is sort of the Fedi’s alternative to Instagram. You can follow people on Pixelfed from Mastodon etc and vice versa.
Fediverse address:
@pixelfed@mastodon.social
A new type of Fediverse server software which runs on cheap lightweight hardware and emphasises user safety and privacy. It supports both allowlists and blocklists, imports of lists from other servers, non-federated servers etc. To keep it lightweight there is no built-in web app at all, it is used entirely through third party apps compatible with the Mastodon API. It’s still in alpha testing but the official account is already running on a GoToSocial instance, and it’s a public alpha so others can have a go too.
Fediverse address:
@gotosocial@superseriousbusiness.org
Free open source third party PixelFed app for Android, available through F-Droid.
Fediverse address:
@PixelDroid@fosstodon.org
Free open source site featuring online versions of traditional board and card games. There are many modes including online multiplayer and single player against AI. You don’t need to register, just generate and share links as needed.
Fediverse address:
@freeboardgames@pixelfed.social
Creator of the “ActivityPub for WordPress” plug-in which turns WordPress blogs into Fediverse servers. When it’s active, people will be able to follow your WordPress account from Mastodon etc, and when you post a new blog entry it will appear as a post on the Fediverse.
Fediverse address (in English and German)
@pfefferle@mastodon.social
Develops and maintains the XMPP standard for instant messaging and voice and video calls. It’s a free open federated standard, so anyone can set up their own server or write their own app. (XMPP used to be known as Jabber.)
Fediverse address:
@xmpp@fosstodon.org
News, reviews, tutorials and videos about Linux and free open source software.
Fediverse address (main):
@9to5linux@floss.social
Fediverse address (videos):
@9to5linux@tilvids.com
Free open source online platform for organising community activism and volunteer initiatives such as food sharing etc. Anyone can set up their own Karrot site, or join an existing site.
Fediverse address:
@karrot@fosstodon.org
Free open source Mastodon app for Android phones, available through F-Droid and Google Play. Can also be used by other Fediverse platforms that use the Mastodon API such as PixelFed and GoToSocial.
Fediverse address:
@Tusky@mastodon.social
Free open source vector drawing software for Linux, Mac and Windows. It’s a libre alternative to Adobe Illustrator.
Fediverse address:
@inkscape@mastodon.art
Free open source podcast player for Android devices. The app lets you listen to podcasts, keep track of episodes and manage your podcast subscriptions through open standards like RSS.
Fediverse account:
@AntennaPod@fosstodon.org
Free open source theme park game inspired by RollerCoaster Tycoon. The game uses entirely libre assets, so you don’t need any proprietary licences to play it. It’s still in alpha testing but playable.
Fediverse address:
@FreeRCT@floss.social
Free open source end-to-end encrypted peer-to-peer messaging system for Android and Linux which can be used online through Tor, or locally through wifi or bluetooth. Because it has local support it can be used even if the internet is shut down or broken, for example at demonstrations or in disaster zones.
Fediverse address:
@briar@fosstodon.org
Free open source encrypted XMPP app for Android produced alongside a member-funded XMPP service, currently in private beta testing. Developed and run by a co-operative based in India.
Fediverse address:
@prav@venera.social
Free open source app that lets you view and search reference materials such as Wikipedia, Gutenberg, StackExchange etc without an internet connection. This can be very useful in remote areas, during temporary outages, or during times of turmoil. Kiwix is available for Linux, Mac, Windows, Android and iPhone/iPad. You can optionally also create a self-hosted Kiwix hotspot, so that anyone physically near your server can access your copy of Kiwix through a local connection.
Fediverse address:
@kiwix@mastodon.social
Free open source real time strategy game set in the ancient world, similar to Age Of Empires. It’s still in Alpha testing, but is playable and available for Linux, Mac, Windows and BSD.
Fediverse address (main):
@play0ad@mastodon.social
Fediverse address (videos):
@playzeroad@videos.pair2jeux.tube
Free open source personal cloud software for sharing files, collaborative editing, instant messaging, personal music streaming and lots of other things. It’s extremely flexible thanks to lots of add-on apps that can be installed through the graphical interface. Nextcloud instances can be accessed through web browsers or dedicated apps for all major platforms. You can host a cloud yourself or sign up on an existing instance.
Fediverse address:
@nextcloud@mastodon.xyz
Free open source platform-independent ad-blocker, which can also block trackers, malware etc.
Fediverse address:
@tblock@fosstodon.org
Small independent company creating a libre laptop called the MNT Reform.
Fediverse address:
@mntmn@mastodon.social
Free open source 3D motor racing simulator for Linux, Mac and Windows, with the emphasis on realistic physics. Speed Dreams is an up-to-date fork of an earlier project, TORCS.
Fediverse address:
@speed_dreams_official@mastodon.social
A new kind of social network which works peer-to-peer, and all personal data is stored locally on your computer or phone. It’s part of the Scuttlebutt network, but has a user-friendly interface, features and branding that are aimed at a more mainstream audience. There are free open source apps for iOS, Android, Linux, Mac and Windows.
Fediverse address:
@manyver_se@fosstodon.org
Organisation that aims to provide free open federated alternatives to sites like CouchSurfing or Warm Showers.
Fediverse address:
@ohn@floss.social
Version of Debian Linux designed for mobile devices.
Fediverse address:
@mobian@fosstodon.org
One of the developers at Blender HQ who creates the brilliant FOSS 3D graphics package Blender, mainly focused on animation and rigging.
Fediverse address:
@sybren@mastodon.art
Database of info about thousands of games for Linux, in English and French.
Fediverse address (in English and French):
@Le_bottin_des_jeux_linux@mastodon.social
Professional illustrator and artist from India, free open source software enthusiast who uses libre tools such as Krita.
Fediverse address:
@raghukamath@mastodon.art
An entertaining collection of videos about Linux, FOSS, computing, gaming, technology and sometimes random other stuff such as tea, vegan food and fountain pens. Were presents with a laid back, calm style which is relaxing to watch.
Fediverse address:
@chriswere@share.tube
Free open source 2D game engine designed mainly for RPGs. Solarus games run on Nintendo Switch, Linux, Mac and Windows.
Fediverse address:
@solarus@mastodon.gamedev.place
Free open source web analytics software, a privacy-friendly libre alternative to Google Analytics. It allows you to keep track of visits to your website without handing over visitors data to Google. There are third party paid hosting services, or you can self-host it for free.
Fediverse address:
@Matomo@mastodon.social
France’s biggest non-profit organisation promoting free open source software. They have created many libre online projects including the Fediverse’s PeerTube, Mobilizon and the “Frama” series of servers.
Fediverse address (in French):
@Framasoft@framapiaf.org
Part of a European Union initiative to transition to free open source software, OSPO handles the commission’s relationships with the libre software community. This account is not just a feed, they do actually interact, boost, reply, follow etc.
Fediverse address:
@EC_OSPO@social.network.europa.eu
Makes calm relaxing tutorial videos about making your own soaps, clothes, craft projects, and using libre software.
Fediverse address:
@craftykat@diode.zone
Funding initiative of the German government promoting development of open software. Anyone can apply for funding who lives in Germany, is self-employed, pays German taxes and publishes their source code on some sort of source forge. (You don’t need German citizenship.)
Fediverse address (in German):
@PrototypeFund@mastodon.social
Free open source decentralised online identity platform. It helps you prove who you are across multiple sites without storing any personal data about you.
Fediverse address:
@keyoxide@fosstodon.org
Free open source quantumn computing SDK for working with quantum computers at the level of pulses, circuits and application modules.
Fediverse address:
@qiskit@qubit-social.xyz
Upcoming free open source UI/UX design tool for Linux. Aimed at web designers and graphic designers, and is currently in alpha testing.
Fediverse address:
@akiraux@fosstodon.org
Free open source Android app for using many different Fediverse platforms including Mastodon, PixelFed, Friendica, PeerTube and more. It’s free if you download it from F-Droid, and paid if you download from Google Play.
Fediverse address:
@apps@toot.fedilab.app
Popular free open source multiplatform game engine for 3D and 2D games.
Fediverse address:
@godotengine@mastodon.gamedev.place
Video series featuring informal discussion of the history of various Linux distributions and related topics
Fediverse address:
@linuxuserspace@tilvids.com
Videos about free open source software and hardware, especially with regard to privacy.
Fediverse address:
@rtp_tips@tube.tchncs.de
The popular free open source desktop email app, available for Linux, Mac and Windows. As well as email, it also works as an RSS news reader, XMPP client and IRC client.
Fediverse account (main):
@thunderbird@mastodon.online
Fediverse account (videos):
@thunderbird@tilvids.com
Free open source language learning platform.
Fediverse address:
@librelingo@fosstodon.org
Free open source online form system. The developers offer form services hosted on their own website, or you can self-host the software if you prefer.
Fediverse address:
@liberaforms@barcelona.social
Independent site with news and articles about mobile devices running Linux.
Fediverse address:
@tuxdevices@fosstodon.org
Free open source project creating a question & answer platform with social aspects. It can be self-hosted, and their long term roadmap includes federation (though it isn’t federated yet).
Fediverse address:
@retrospring@fosstodon.org
Annual conference discussing free open source graphics software, including graphic design, digital painting and more. The conferences have been happening every year since 2006, though the pandemic has somewhat complicated things recently.
Fediverse address (main):
@lgm@post.lurk.org
Fediverse address (videos):
@lgm@conf.tube
Researches, develops and promotes online services designed for human beings rather than corporate profits.
Fediverse address (live streaming):
@fedi@owncast.small-web.org
Fediverse address (co-founder Laura Kalbag):
@laura@mastodon.laurakalbag.com
Fediverse address (co-founder Aral Balkan):
@aral@mastodon.ar.al
Popular free open source password manager available in lots of flavours including Android, iOS, Linux, Mac and Windows.
Fediverse address:
@bitwarden@fosstodon.org
Free open source online office suite. There’s an official paid service available, or you can host it yourself for free.
Fediverse address:
@ONLYOFFICE@fosstodon.org
Develops free open source alternatives to Google’s proprietary services in Android.
Fediverse address:
@microg@fosstodon.org
Manufacturer of low-price Linux-based smartphones, computers, smartwatches etc. Their products are aimed at technology fans who like to customise and tinker with gadgets.
Fediverse account (main):
@PINE64@fosstodon.org
Fediverse account (videos):
@pine64tilvids@tilvids.com
Fediverse account (European shop):
@pine64eu@fosstodon.org
Posts jobs available at companies and organisations that develop and improve Free Open Source Software, Open Source Hardware or related projects.
Fediverse address:
@fossjobs@fosstodon.org
European Union initiative which is helping to fund free open decentralised social media like Mastodon and PeerTube, as well as many other libre online projects.
Fediverse address:
@EC_NGI@social.network.europa.eu
Free open source software which allows classic adventure games, graphic adventures and RPGs to run on modern, old and unusual hardware.
Fediverse address:
@scummvm@corteximplant.com
Free open source XMPP app for Linux and Android, and part of the KDE project. Includes OMEMO support for end-to-end encryption.
Fediverse address:
@kaidan@fosstodon.org
Linux distribution intended for creative people, and includes preinstalled free open source software for image, audio, video and text editing.
Fediverse address:
@ubuntustudio@mastodon.art
Free open source operating system for PCs which is compatible with MS-DOS software. This allows you to run older games and other applications, as well as create DOS-based embedded systems.
Fediverse address:
@freedosproject@fosstodon.org
A new project that aims to combine an open source hardware device with FOSS federated social networks to allow you to physically control your own data, and to operate offline too if you want.
Fediverse address:
@bonfire@indieweb.social
The Free and Open source Software Developers’ European Meeting is a well-established non-profit annual conference all about FOSS. It has taken place every year since 2000, though the most recent ones have been online due to the pandemic.
Fediverse address:
@fosdem@fosstodon.org
Privacy-friendly free open source online office suite. It can be self-hosted, or you can use the official instance. It’s collaborative and anonymous, with “zero knowledge” encryption so no one can access your data except you and those you choose to share with.
Fediverse address:
@cryptpad@fosstodon.org
Pixel artist and creator of mods for Minetest (the free open source alternative to Minecraft).
Fediverse address:
@zughy_boi@mastodon.social
Long-running German-language website about Linux and libre gaming. They also provide a variety of libre services including XMPP chat, a Matrix room and Minetest servers.
Fediverse address (in German):
@holarse@mastodon.social
Private company which develops free open software for instant messaging through XMPP. They have a number of XMPP projects including server software and apps for MacOS (Beagle), iOS (Siskin) and Android (Stork).
Fediverse address:
@tigase@fosstodon.org
Develops and promotes FOSS applications and open source hardware for professional filmmaking. One of their flagship products is the Axiom range of open hardware high end film cameras, produced in association with Magic Lantern (the makers of unofficial Canon firmware).
Fediverse address:
@apertus@mastodon.social
The most popular free open source office suite, it includes a word processor, spreadsheet, presentation software etc. It’s very widely used by businesses, governments, organisations and individuals, and is available for Linux, Mac and Windows.
Fediverse address:
@libreoffice@fosstodon.org
There are also user groups on the Fediverse:
Fediverse address (in Spanish):
@LibreOfficeEs@mastodon.social
Fediverse address (in French):
@LaMouetteODF@framapiaf.org
Portuguese community group sharing information about Linux and free open source software.
Fediverse address (in Portuguese):
@centrolinux@masto.pt
Community-driven Linux distribution based on the now-defunct Mandriva.
Fediverse address
@openmandriva@linuxrocks.online
Blog all about Linux, FOSS and related topics. Sister publication to the OMG! Ubuntu website.
Fediverse address:
@omglinux@mastodon.social
Free open source cross-platform game engine (previously known as Xenko).
Fediverse address:
@xenko@mastodon.gamedev.place
A non-profit organisation which promotes free open source software and defends it in the courts if necessary.
Fediverse address:
@conservancy@mastodon.technology
Linux distribution based on Ubuntu, featuring a customised desktop environment called “COSMIC”. Maintained by the computer manufacturer System 76.
Fediverse address:
@pop_os_official@fosstodon.org
Italian-language site about privacy-friendly apps and services, reviews of FOSS games, news about online privacy etc.
Fediverse address:
@lealternative@mastodon.uno
IT expert, software developer, good guy hacker, long-time Fediverse user. Fighting for privacy rights, libre software and ethical tech. Did information security and infrastructure for Panama Papers journalists, amongst others.
Fediverse address:
@rysiek@mstdn.social
A free open source collaborative online calendar. It allows local communities to share a common calendar that anyone can post events to, even people without an account. (Posts are moderated to prevent spam though.) You can also interact with Gancio through the Fediverse, and it has RSS support for people who want to follow through feed readers.
Fediverse address:
@gancio@mastodon.cisti.org
A co-operative organisation creating Go-based resources for the XMPP instant messaging protocol.
Fediverse address:
@mellium@fosstodon.org
Long-running free PDF magazine and podcast devoted to the Ubuntu and Linux communities, founded in 2007.
Fediverse address:
@fullcirclemagazine@mastodon.social
Free open source open world role playing game with voxel graphics, inspired by Cube World and Breath Of The Wild. There are online multiplayer options, and you can host your own server too. It’s available for Linux, Mac and Windows.
Fediverse address:
@veloren@floss.social
Free open source 3D game engine, for creating Minecraft-style games and worlds. There’s a large range of game modes and mods available, including online multiplayer. It’s available for Linux, Mac, Windows, BSD and Android.
Fediverse address:
@Minetest@fosstodon.org
Worldwide free open source software community which creates all kinds of popular useful projects such as the Plasma desktop, Kdenlive, Krita and lots more.
Fediverse address (main):
@kde@floss.social
Fediverse address (conference videos):
@kde@conf.tube
Fediverse address (Spanish language community):
@kde_espana@floss.social
Fediverse address (French language community):
@kdefr@framapiaf.org
Free open source cross-platform game engine designed to be easy to learn. The engine’s code is FOSS, with optional paid-for cloud services on the official website.
Fediverse address:
@gdevelop@mastodon.gamedev.place
Free open source alternative web client for Mastodon servers. Currently in Alpha testing.
Fediverse address:
@elk@webtoo.ls
Free open source web interface for 3D printers, which lets you remotely control them from within your web browser.
Fediverse address:
@octoprint@fosstodon.org
Free open source community fork of the Drone Continuous Integration platform.
Fediverse address:
@WoodpeckerCI@floss.social
Aims to provide a next generation internet with better privacy, more decentralisation, less spam and better energy efficiency by using “multicast”.
Fediverse address:
@librecast@chaos.social
Free open privacy-friendly replacement for closed source Android apps that some accessories require, for example some brands of fitness trackers, smartwatches, headphones etc.
Fediverse address:
@gadgetbridge@social.anoxinon.de
Free open source game preservation platform for Linux PCs which lets you access your games collections from many different platforms. It includes a collection of emulators and compatibility layers to help even older games run correctly on your current machine.
Fediverse address:
@lutris@fosstodon.org
Information Security blogger, live streamer and educator, runs the Infosec blog Taggart Tech.
Fediverse address:
@mttaggart@fosstodon.org
News site featuring tips and articles about Ubuntu, Linux, free open source software and related topics.
Fediverse address:
@omgubuntu@floss.social
Free open source alternative to Google Play. Looks a bit like an app store, but it’s entirely FOSS apps.
Fediverse address:
@fdroidorg@floss.social
Community-run Linux distribution which is 100% compatible with Red Hat Enterprise Linux.
Fediverse address:
@rockylinux@fosstodon.org
Popular long-established Linux distribution first released in 2003, sponsored by the US software company Red Hat.
Fediverse address:
@fedora@fosstodon.org
German company which sells smartphones with pre-installed de-googlised Android or Ubuntu Touch.
Fediverse address (in English and German):
@volla@mastodon.social
Very popular free open source e-mail app for Android. It is due to become the official Thunderbird app for Android devices.
Fediverse address:
@k9mail@fosstodon.org
A special version of Linux that aims for maximum privacy and anonymity. Tails runs entirely off a USB stick, it uses the Tor network to connect to the internet, and by default it resets/forgets everything you’ve done when you switch it off. (You can also optionally save encrypted data if you need to keep something.)
Fediverse address:
@tails@fosstodon.org
Site covering all kinds of events related to free open source software.
Fediverse address:
@foss_events@fosstodon.org
Version of Linux which makes it as easy as possible to install and maintain your own self-hosted online services. There’s a really easy graphical interface, it works on home servers or remote ones, and it supports older and lower powered computers too.
Fediverse address (main account in English and French):
@yunohost@mastodon.social
Fediverse address (video account in English and French):
@yunohost@cinema.yunohost.support
Non-profit hosting service for FOSS projects, their source code and their development. It is powered by the self-hostable FOSS forge software Gitea.
Fediverse address:
@Codeberg@social.anoxinon.de
Flexible Linux distribution where the source is compiled locally according to the user’s preferences.
Fediverse address:
@gentoo@fosstodon.org
Free open source operating system for smartwatches, based on Linux.
Fediverse address:
@AsteroidOS@fosstodon.org
FOSS wiki software aimed at businesses, it’s inteded as an alternative to Confluence and Mediawiki.
Fediverse address:
@XWiki@social.weho.st
General purpose Linux distribution which is shipped as a minimal base system by default, letting the user add what they need.
Fediverse address:
@archlinux@fosstodon.org
Multi-disciplinary academic web search engine run by Bielefeld University in Germany. It has been operating since 2004 and is one of the largest in the world.
Fediverse address (in German and English):
@base@openbiblio.social
Software engineer and core developer on Minetest, the free open source voxel game platform.
Fediverse address:
@rubenwardy@fosstodon.org
Grassroots group that holds an annual event to promote free open software and hardware. They are based in Seattle, WA, USA, but their events have been online recently due to the pandemic.
Fediverse address (main):
@SeaGL@mastodon.social
Fediverse address (photos):
@SeaGL@pixelfed.social
Weekly podcast about Linux and Free Open Source Software.
Fediverse address:
@thelinuxcast@fosstodon.org
Free open source interface prototyping and design platform. It operates entirely through web browsers using SVG, so it can be used collaboratively and on any OS.
Fediverse address:
@penpot@fosstodon.org
Develops and maintains a free open source desktop environment used by many popular versions of Linux including Ubuntu, Debian, Fedora etc.
Fediverse address (main):
@gnome@floss.social
Fediverse address (in Portuguese):
@gnome_br@mastodon.social
Linux distribution based on Ubuntu with emphasis on ease of use. Comes bundled with popular and useful free open source apps.
Fediverse address:
@linuxmint@mastodon.social
Works on Firefox for Mozilla, and runs a live stream featuring programming techniques called “The Joy of Coding”. The stream is on Twitch and PeerTube, and there’s an archive of past episodes on PeerTube.
Fediverse address:
@mconley@diode.zone
Web-based OpenStreetMap graphical inteface which lets you view themed maps and edit them with an OSM ID.
Fediverse address:
@MapComplete@en.osm.town
Linux distribution that makes it easier to create and maintain your own home server. It works on a variety of hardware including older or lower powered computers, and you can also buy it pre-installed on a single board computer.
Fediverse address:
@freedomboxfndn@mastodon.social
Develops and maintains Ubuntu Touch, a Linux-based operating system for smartphones and tablets. Ubuntu Touch was originally started by Canonical, but UBports took over development and maintenance in 2017.
Fediverse address:
@ubports@mastodon.social
Make free open source command line interface apps, libs and back ends.
Fediverse address:
@charmcli@mastodon.social
The most popular part of the Fediverse, there are thousands of Mastodon servers with millions of registered users. Mastodon is a microblogging platform where people can post up to 500 characters of text as well as attach images, audio and video.
Fediverse address:
@Mastodon@mastodon.social
Version of Linux aimed at software developers and system administrators.
Fediverse address:
@opensuse@fosstodon.org
Lightweight and secure Linux distribution based on musl libc and busybox.
Fediverse address:
@alpinelinux@fosstodon.org
KDE developer posting lots of interesting videos all about software created by the KDE community and related topics.
Fediverse address:
@veggero@tube.kockatoo.org
Free open source end-to-end encrypted peer-to-peer calling and messaging app. It supports video calls, audio, messaging and has a Skype-style interface. It has apps for all major platforms including Android, iPhone/iPad, Linux, Mac and Windows.
Fediverse address:
@Jami@mstdn.io
Developing the next generation of Fediverse platforms, led by Christine Lemmer-Webber who co-authored the ActivityPub technical standard which the current Fediverse is built upon. (Previously known as the Spritely Project.)
Fediverse address:
@spritelyinst@octodon.social
Creates precise but psychedelic, colourful and detailed artwork, often related to animals and/or libre projects. For example, Ubuntu releases often receive a new piece of artwork by Ritter based on that version’s animal mascot.
Fediverse address:
@sylvia_ritter@mastodon.social
Aims to make it easier to check the source code of free and open source software. Reproducible Builds promotes tools and practices to help verify that open source code has not been altered before distribution.
Fediverse address:
@reproducible_builds@fosstodon.org
German-language news site and podcast about Linux and free open source software.
Fediverse address (in German):
@gnulinux@social.anoxinon.de
Free open source app that lets you add an end-to-end encrypted folder to your existing cloud service. It works with popular cloud services such as Nextcloud, DropBox, Google Drive, One Drive, iCloud etc. There are apps for Linux, Mac, Windows, iPhone/iPad and Android.
Fediverse address:
@cryptomator@mastodon.online
Free open source software enthusiast, teaches computing with FOSS, blogs about Ubuntu and libre software.
Fediverse address:
@ademalsasa@floss.social
Free open source electronics design automation suite, available for Linux, Mac and Windows.
Fediverse address:
@kicad@fosstodon.org
Free open source photography app which lets you organise, view and develop raw image files, somewhat like a libre alternative to Adobe Lightroom (though the feature sets are very different). It’s available for Linux, Mac and Windows.
Fediverse address:
@darktable@mastodon.social
A Fediverse video sharing and livestreaming, platform, sort of like YouTube but federated onto lots of independent servers. Because it’s part of the Fediverse, you can follow PeerTube accounts from Mastodon etc and the new videos will appear in your timeline just like normal posts. You can also interact with them within your timeline, for example replies to a PeerTube video within Mastodon will turn into comments under that same video on PeerTube.
Fediverse address:
@peertube@framapiaf.org
Free open source software to help organise the translation and localisation of projects. Very widely used by the libre software community to allow crowdsourced translation.
Fediverse address:
@weblate@fosstodon.org
Free open source end-to-end encrypted messaging system that works through email. This means if you both have Delta apps running you can chat in encrypted mode, but even people without Delta can chat with you through their normal email account. It’s available for Android, iOS, Linux, Mac and Windows.
Fediverse address:
@delta@chaos.social
Federated free open source communications platform with support for messaging and calling. The platform has many different apps available with the most popular being Element (formerly known as Riot).
Fediverse address:
@matrix@mastodon.matrix.org
Software developer and retro computing enthusiast, collects old computers and creates retro software for MS-DOS such as the FOSS Mastodon client DOStodon and the JavaScript environment DOjS.
Fediverse address:
@dec_hl@mastodon.social
Free open source encrypted platform that allows whistleblowers and activists to contact journalists and NGOs anonymously through the Tor network.
Fediverse address:
@securedrop@fosstodon.org
Free open knowledge base, available for anyone to use on any project. It is collboratively edited like Wikipedia, and its contents is public domain.
Fediverse address:
@wikidata@wikis.world
Developing an ebook creation platform, which includes an open markup language and free open source tools.
Fediverse address:
@nantucketebooks@fosstodon.org
An off-beat podcast about free open software, making stuff, handicrafts and related topics.
Fediverse address:
@fossandcrafts@octodon.social
Version of Ubuntu Linux using the KDE Plasma desktop interface.
Fediverse address:
@kubuntu@fosstodon.org
Organisation that promotes free open source software and open hardware across Asia. It organises events, software and hardware projects, coding workshops etc.
Fediverse address:
@fossasia@floss.social
An app for Android phones available through F-Droid which makes it as easy as possible to share photos on the Fediverse. It’s based on an app by PLA, who enjoyed sharing pictures on the Fediverse while out and about. PLA sadly died in January 2021, and Fediphoto Lineage aims to honour his memory by keeping his project alive.
Fediverse address:
@fediphoto_lineage@libranet.de
Fediverse server type with a Facebook-style interface and no character limit. It is extremely flexible and lets you follow many kinds of accounts in a single timeline including the Fediverse, RSS, Twitter and others.
Fediverse account:
@news@forum.friendi.ca
A free open source live streaming platform with built in chat, it’s like a libre alternative to Twitch. It’s now part of the Fediverse so you can follow OwnCast accounts from Mastdon etc. When an OwnCast account goes live, people who follow it will see a message appear in their timeline.
Fediverse address:
@owncast@fosstodon.org
Free open source software for running XMPP instant messaging servers, and one of the most popular ways to set up an XMPP server.
Fediverse address:
@prosodyim@fosstodon.org
Free open source non-profit platform for making recurring donations to projects or people. It’s like a libre alternative to Patreon. The project is funded entirely by donations made through its own platform.
Fediverse address:
@Liberapay@mastodon.xyz
Linux distribution for data science, bundled with free open source data science tools and apps. Based on Ubuntu and Lubuntu.
Fediverse address:
@datlinux@fosstodon.org
German language site featuring tutorials for self-hosting your own free open source services, and the same site also provides a number of libre online services.
Fediverse address (in German):
@adminforge@kanoa.de
Fork of the LibreOffice productivity suite aimed at businesses, including long term tech support, admin tools, smartphone apps and cloud collaboration.
Fediverse address:
@CollaboraOffice@mastodon.social
Its development company, Collabora, is one of the biggest upstream contributors to LibreOffice’s source code, and has a close relationship with the FOSS community.
Fediverse address:
@collabora@floss.social
Free open source Matrix messaging app for Linux desktop and Linux mobile. It’s made by KDE.
Fediverse address:
@neochat@fosstodon.org
European company selling de-Googlised Android smartphones. The phones themselves are made by established manufacturers such as Fairphone and Samsung, and can be refurbished models if you want to reduce the impact on the environment (or if you just want a cheaper phone).
Fediverse address:
@iode@mastodon.online
AUR-style package manager for Ubuntu.
Fediverse address:
@pacstall@social.linux.pizza
Non-profit organisation that maintains the Tor network, which allows people to communicate anonymously over the internet thanks to a special network that scrambles any attempts to trace connections. The easiest way to use Tor is with the Tor web browser, which you can download from their website.
Fediverse address:
@torproject@mastodon.social
Free open source operating system which visually resembles MacOS, but is built upon Ubuntu Linux.
Fediverse address:
@elementary@mastodon.social
XMPP-based free open federated messenger project. It aims to make XMPP into a more viable alternative to Whatsapp etc by providing consistency in design and terminology, while still maintaining compatibility with other XMPP apps and servers. (It’s a similar plan to how Mastodon made ActivityPub more mainstream while still being compatible with other ActivityPub server types.)
Fediverse address:
@snikket_im@fosstodon.org
A free open source video conferencing site which aims to provide a privacy-friendly alternative to proprietary services. Calls are made through the web browser using the BigBlueButton platform.
Fediverse address (in German and English):
@senfcall@chaos.social
Community that promotes free open software which is lightweight, simply designed and easy to use.
Fediverse address:
@simpletools@fosstodon.org
Website from the creator of Fedi.Directory (that’s me!) which helps non-technical people create their own online services through managed hosting providers. Managed hosting means the hosting company does all the technical stuff behind the scenes, but you own and run the service. This allows anyone to make their own Fediverse servers, personal clouds, music streaming services and much more.
Fediverse address:
@homegrown@social.growyourown.services
Brand new project trying to create a short video clip sharing service for the Fediverse (sort of a free open federated alternative to TikTok or Vine). It’s still in its very early rough draft stages, but is making steady progress.
Fediverse address:
@Goldfish@mstdn.social
FOSS smartphone interface developed by KDE which runs on top of a Linux distribution.
Fediverse address:
@plasmamobile@fosstodon.org
Free open source alternative to Linktree, which helps people publish links to all their profiles and sites on a single page.
Fediverse address:
@littlelink_custom@mstdn.social
Organisation that helps co-operatives and collectives to create their own online clouds using free open source software.
Fediverse address:
@coopcloud@social.coop
Linux distribution based on Debian designed for computer security tasks such as digital forensics, penetration testing, security research and reverse engineering.
Fediverse address:
@kalilinux@infosec.exchange
Non-profit developing the free open source NVDA screen reader for Windows. Based in Australia.
Fediverse address:
@NVAccess@fosstodon.org
Talented illustrator, creator of the Pepper & Carrot webcomic (available under creative commons), Krita instructor and a keen supporter of libre software. Many FOSS projects have artwork by Revoy.
Fediverse address:
@davidrevoy@framapiaf.org
OONI monitors network-level blocking of internet access, which is usually by governments or ISPs, and flags up any mass internet blocks or other interference. They also develop FOSS tools for carrying out this monitoring.
Fediverse address:
@ooni@mastodon.social
Organisation that promotes the use of free open source software in game development, and posts videos all about this.
Fediverse address:
@gdquest@tilvids.com
Linux distribution based on the “unstable” branch of Debian.
Fediverse address:
@siductionlinux@floss.social
Portuguese language podcast about Ubuntu, libre software and other topics.
Fediverse address (in Portuguese):
@pup@masto.pt
Volunteers creating free open source software for healthcare organisations, doctors, hospitals etc.
Fediverse address:
@librehealth@floss.social
Widely used free open source professional painting application, also suited to drawing, illustration and 2D animation work.
Fediverse address (main):
@Krita@mastodon.art
Fediverse address (videos):
@kritafoundation@share.tube
Fediverse address (community):
@Krita_artists@mastodon.social
Free and Open Source Software Optimization Engineering. Focused on low level vectorization of host and accelerator devices. Very into puns, obsessed with pushing the boundaries of CFD performance.
Fediverse address:
@FelixCLC@mastodon.social
Free open source platform for keeping track of your physical book collection including any books you lend. It’s suitable for individuals with lots of books, or organisations wanting to start their own private library. It has its own built-in database of titles and the latest version includes Fediverse features.
Fediverse address:
@inventaire@mamot.fr
A non-profit coalition of Dutch broadcasters, museums, arts organisations etc. campaigning for an ethical internet. They organise conferences on this topic, and run their own Fediverse servers.
Fediverse address (main, in Dutch and English): @publicspaces@publicspaces.net
Fediverse address (videos, in Dutch and English): @publicspaces@video.publicspaces.net
Fediverse address (podcasts, in Dutch and English): @TheTimeIsNow@podcast.publicspaces.net
Free open source XMPP/Jabber app for Linux which includes support for end to end encrypted messaging, voice/video calls and conferencing.
Fediverse address:
@dino@fosstodon.org
Free open source strategy game about human history, inspired by the Civilization games.
Fediverse address:
@freeciv@fosstodon.org
Excellent free open source video editing software, it’s a proper NLE with many useful features, and probably the most popular libre alternative to Adobe Premiere. As the name suggests, it’s made by the KDE FOSS community.
Fediverse address:
@kdenlive@floss.social
Free open source alternative to Google Keep. It lets you take notes and sync them with a NextCloud account. The apps are available for Android (through F-Droid and Google Play) and NextCloud.
Fediverse address:
@Carnet@framapiaf.org
Free open source alternative to Pocket and other article-saving services. There are apps for Android, iOS, Windows, Linux, Firefox, Chrome, Kindle, Kobo and others. It is also compatible with RSS readers. You can self-host your own instance for free, or use the paid-for flagship instance.
Fediverse account:
@wallabag@social.tcit.fr
Open Source Technical Leader at Cisco’s Open Source Programs Office (OSPO). Co-founder of Open Source Stories and contributor to LeadDev. Also posts about disabilities.
Fediverse address:
@juliaferraioli@floss.social
The E Foundation develops and maintains a free open source privacy-friendly de-Googled version of Android, which you can either install yourself on your existing phone or buy pre-installed on a new phone. They sell pre-installed phones through the Murena brand, all of which are manufactured by established companies like Fairphone, Samsung etc.
Fediverse address (E Foundation):
@e_mydata@mastodon.social
Fediverse address (Murena):
@murena@mastodon.social