The best Open Source accounts on Mastodon.
Open Source
Hugo van Kemenade
@[email protected]Python 3.14 & 3.15 release manager, core developer, Sovereign Tech Fellow, PSF Fellow, open-source maintainer, PEP editor, NaNoGenMo organiser, winter bicycler
Matthias Endler
@[email protected]LOLCODE parser disguised as a human.
I mostly talk about 🦀 Rust and 🧑💻 Open Source.
Reach out for Rust contract work / consulting!
Some of my other projects:
http://codeprints.dev
http://analysis-tools.dev
http://openpodcast.dev
http://lychee.cli.rs
Michael Boelen
@[email protected]Founder of CISOfy; author of #infosec tools rkhunter and Lynis; involved with NLUUG, #openstandards and #opensource; helping companies to secure their #Linux environment; interested in #sustainability and sharing messages in English, sometimes in Dutch 🇳🇱. My Dutch-only account is also @mboelen (mastodon.nl).
eerlijkdigitaalonderwijs.nl
@[email protected]🇳🇱 Het huidige digitale onderwijssysteem wordt gedomineerd door techgiganten. Fundamentele rechten, zoals de privacy, vrijheid en soevereiniteit van kinderen, ouders en opvoeders zijn onvoldoende gewaarborgd. Ed-tech is voornamelijk closed source en zit vol vendor lockins. Producten zijn te duur, verzamelen te veel gegevens of beide. Het is nu tijd om op surveillancekapitalisme gebaseerde Ed-tech te vervangen door ethische vrije opensource alternatieven.
🇬🇧 Bio's are short, see website :)
Erioldoesdesign
@[email protected]They/them 🏳️🌈 🌻
D&D Nerd 🎲
Human-rights centred designer + OSS
https://erioldoesdesign.github.io/
PhD dropout
Open Source Design wrangler/maintainer @opensrcdesign
(toots = my 🧠)
Andrew Nesbitt
@[email protected]Package Management Nerd, working on mapping the world of open source software https://ecosyste.ms and blogging about package managers at https://nesbitt.io
Pensador Louco
@[email protected]
Cara estranho, anarquista, entusiasta de FOSS, escritor e podcaster responsável por cometer o Teatro Escuro do Pensador Louco. Siga-me por tua livre e espontânea vontade.
FOSS Backstage
@[email protected]Community, Management, and Compliance – #FOSSBack is a two day conference dedicated to everything related to #FLOSS governance and open collaboration: open source project leadership, community management, project metrics, Open Source strategy for enterprise, #InnerSource/#OSPO, legal matters when dealing with #FOSS and many more. The next edition of FOSS Backstage will take place March 16-17, 2026.
Alex Bradbury
@[email protected]Compilers at Igalia. @llvmweekly author. Mostly RISC-V, LLVM, and a little WebAssembly. Previously lowRISC CTO and co-founder. Blogs at https://muxup.com
Sarah L. Fossheim
@[email protected]Independent web and dataviz accessibility specialist, ethical tech advocate. Background in front-end engineering and design. Based in Vardø, arctic Norway.
💼 Open for freelance projects, accessibility consulting, training, workshops, and talks.
Personal account: @lomvia
Photography: @fosstography
Non-binary, pronouns: they/them 
Pirmin Kalberer
@[email protected]Open Source GIS developer and co-founder of Sourcepole 🇨🇭.
#rust programmer, #paragliding, #railway tours.
Dyne.org foundation
@[email protected]We are Free to Share Code
and we Code to Share Freedom!
Free Software Foundry and Digital Community of Artists, Hackers and Activists.
LinuxNews.de
@[email protected]Nachrichtenseite für Linux, Freie Software, und Open Source. News, Artikel und Meinung für Desktop und Enterprise.
root@linuxnews:~# rm -rf proprietary_software/ – weil Freiheit keine Dateierweiterung braucht.
Iris Young (he/they/she) (PhD)
@[email protected]Structural biology (XFEL crystallography, cryoEM, electron crystallography) data processing methods developer. I use my degree in chemistry to write software to use physics to understand biology. As of 2024, based in Hamburg.
70% coffee by volume. I’m really into electronics, 3D printing, and sewing right now, and trying very hard to learn German. I have a very fluffy and affectionate cat. Big fan of bicycles and trains, better public infrastructure generally, and investment in collective wellbeing generally. Food motivated; very easily bribed with coffee and pastries. Always learning.
I'd rather you get a sense of my values from checking my feed, but in very-very-brief, fascism is bad, open source and open science are necessary but not sufficient, and the right to repair includes yourself.
Joel
@[email protected]
I blog quite a bit, reader, gamer, foss enjoyer & contributor (barely).
I'm like the polar opposite of myself 
Mexican 🇲🇽, Mechatronics Engineer 🤖. Customization freak. 🎨
#PSP best handheld, #MiyooMiniPlus and #Anbernic devices too! 🕹️
#ChronoTrigger is my favorite game 🗡️
I solve a Rubik's cube in ~15 seconds⏳
I like #origami too. Christian ✝️
alt account: @joel
Uses:

Hylke Bons 🥜
@[email protected]product designer who codes.
I design and build software.
both how it looks, and how it works.
🌱 laid off in 2026 and now running free design services for #FOSS projects. want to become a sponsor? https://planetpeanut.studio/sponsors 🌱
been doing design in #OpenSource like #GNOME, #Pidgin, #Intel, #RedHat, #Xamarin, #VSCode and more for 2 decades. enjoy creating #PixelArt #RetroGames for #GameBoy / #NES.
🍵 green tea lover
📷 lazy film photographer
🌌 #aurora chaser
#NoAI in my work.
James Endres Howell
@[email protected]Associate Teaching Professor, Biochemistry and Molecular Biology, large university USA
Born at 326 ppm CO₂
#Microbiology #Biochemistry #MolecularBiology #CellBiology #MolecularMedicine #Evolution #Academia #HigherEd #Education #Science in #Humanities #Debian #GNU #Linux #GNULinux #FreeSoftware #LibreSoftware #FLOSS #FOSS #GrapheneOS #OrgMode #EmacsLisp
Janne Moren
@[email protected]HPC support engineer in Okinawa, Japan. Former neuroscientist, former programmer.
Photography, bouldering, recreational programming and playing the sanshin are things I do.
Sweden, Osaka and Okinawa are places I particularly care about.
Alexis Brignoni
@[email protected]
Digital forensics nerd. Opinions are mine and subject to change. He/Him.
#DFIR #DigitalForensics #FOSS #Python #OSDF #MobileForensics
Whoami?
🖥 Developer of open-source tools for digital forensics (iLEAPP, ALEAPP, & RLEAPP.)
📱 Digital forensics examiner specializing in mobile forensics.
🔊 Public speaker on cybersecurity and digital investigations.
🃏 Certified Digital Forensics Memer
☑️ Cath
@[email protected]Pirate 🏴☠️, Frisian in Rotterdam, FreeSoftware (free, as in freedom, not as in free beer) #Ubuntu, #PardonAssange 🍀 #music #politics
sleet01
@[email protected]Generic PNW dev.
I __main__ Python.
駄洒落は大🎿だ。
LGBTQAI2S+ ally.
Too many hobbies.
FOSS enthusiast.
Seeking a more just society.
Pronouns: he/him.
Header is a size-accurate group shot of many classic giant robots from anime history.
Profile pic is me in an Otakon 2006 tee shirt from *cough* a few years back.
### Hashtag block ###
#transformers
#earthdefenseforce
#revolutionarygirlutena
#progressive
#battletech