The most popular accounts on Mastodon.
It's FOSS
@[email protected]World's leading Linux and Open Source web portal.
https://itsfoss.com/
Tuta
@[email protected]Tuta is a secure email, calendar and drive provider with quantum-safe encryption. Open source & forever free! 🔒
Visit us 👉 http://tuta.com
Made with ❤️ in Europe
Proton
@[email protected]Official Proton account, creator of Proton Mail, Proton Drive, Proton Pass, Proton VPN, Proton Wallet, Proton Meet, and Lumo.
Support queries are handled by our Customer Service Team: https://proton.me/support
European Commission
@[email protected]News and information from the European Commission. A project to foster our presence in the fediverse and support our commitment to European social media platforms based on open source technology. 🇪🇺 Official Mastodon account as verified by the official EU domain in our server’s address (https://europa.eu).
Electronic Frontier Foundation
@[email protected]Claw Back Your Privacy
Support free expression and fight the mass surveillance used for control and intimidation. https://eff.org/spring
nixCraft 🐧
@[email protected]Enjoy Linux & Unix-like systems, open-source software, and programming? Into Sysadmin & DevOps? Follow us to make the most of your IT career! Discover new tools, IT news, and apps daily, plus a dose of humor.
System76 
@[email protected]
We make powerful Linux computers and Pop!_OS to help you do more, go further, and unleash your potential. Manufacturing in Denver, CO.
Jellyfin
@[email protected]The Free Software Media System. Available on GitHub. Sometimes referred to as Jeff. Not to be confused with Jif. Toots by @[email protected] (TZ America/Toronto). Replies may be slower during the day.
Liam @ GamingOnLinux 🐧🎮
@[email protected]News + Opinions. One person mostly. Creator of many forms. Support on Patreon: http://patreon.com/liamdawe https://www.gamingonlinux.com (official account)
If you want me, email me: [email protected]
Nick @ The Linux Experiment
@[email protected]YouTube content creator and Linux user living in Brest, Brittany. Might post gaming related stuff, especially if it runs on Linux, natively or not ! #linux #opensource #tech #gaming
evacide
@[email protected]Director of Cybersecurity
@EFF
/ Co-founder of
@stopstalkerware
/ These are my opinions, not my employers’ / I did a TED talk once
Kevin Beaumont
@[email protected]Cybersecurity weather person and award winning shitposter. Shitposting is an anagram of Top Insights. You may be surprised to know I am not representing my employer here and these are not their opinions.
I have Direct Messages disabled - you can send them, but I will never receive them.
Blender 🔶
@[email protected]Official account for the Free and Open Source 3D creation suite. Free to use for any purpose, forever.
Techlore
@[email protected]Techlore educates people about digital rights, privacy, security, and freedom to push the world toward a safer internet. We envision a world where technology works for us, not against us—and we're proving that individuals can make real impact for themselves and their communities.
Kuketz-Blog 🛡
@[email protected]Kuketz-Blog: Gegen Überwachungskapitalismus ✊
Datenschutz, IT-Sicherheit und digitale Selbstbestimmung – kritisch, unabhängig und spendenfinanziert.
#Sicherheit | #Datenschutz | #Hacking | #Security | #Privacy | #Infosec | #DSGVO | #Netzpolitik | #Karlsruhe
Hier schreibt die Redaktion des Kuketz-Blogs:
/kuk @kuketz
/meb @rufposten
/lax @lacrosse
Hilfe & Support: https://www.kuketz-forum.de/
Impressum: https://www.kuketz-blog.de/impressum/
Toots werden nach 2 Jahren gelöscht ✅
A worldwide technology community 🌍 Creators of the Plasma desktop & a variety of Free and open source applications that let you control your digital life.
Lesley Carhart 
@[email protected]
I am eminently qualified to speak from experience about a variety of dumpster fires.
ICS cybersecurity person, @pancakescon organizer, martial artist, marksman, humanist, level 14 Neutral Good rogue, USAF retired. Speaker available for gigs.
Gin connoisseur. Rodent parent. Some dipshit from Chicago. Now an immigrant in Melbourne.
I post *very serious* things about infosec. Thoughts are entirely my own.
'they/them' 🏳️🌈 
DAVx⁵ 
🔄
@[email protected]
The all-in-one CalDAV/CardDAV/WebDAV solution for Android.
Sync your address books, calendars + tasks/notes/journals at once. Get live access your WebDAV files. And… it's FOSS!
Account has also news for ICSx⁵ (Webcal for Android).
Open Source Programme Office
@[email protected]The go-between for all things open source in the European Commission
F-Droid
@[email protected]F-Droid is an installable catalogue of FOSS (Free and Open Source Software) applications for the Android platform.
Sovereign Tech Agency
@[email protected]Strengthening digital infrastructure and open source ecosystems in the public interest. Home of the Sovereign Tech Fund, Sovereign Tech Resilience, Sovereign Tech Fellowship, and other programs supporting critical FOSS technologies.