eldr & Open Source
Software is better
when it is shared.
We believe free and open source software makes the world a genuinely better place. It accelerates progress, keeps power distributed, and gives every developer — regardless of background or budget — access to great tools. That is why we contribute back.
Our commitment
Building in the open, giving back freely.
The tools we use every day — the languages, the frameworks, the operating systems — exist because someone chose to share their work rather than lock it away. We owe an enormous debt to that tradition, and we take it seriously.
At eldr, we release libraries, templates, and tools under permissive licences so that other developers can build on them, learn from them, and improve them. We do this not because it is good marketing, but because it is the right thing to do.
Good software, freely available, can solve real problems for people who could never otherwise afford it. That is a goal worth working towards.
Community first
Great software grows from communities. We welcome issues, contributions, and forks — the more, the better.
Permissive licences
We use MIT and similarly permissive licences so you can use our code in your own projects, commercial or otherwise, without friction.
Learning & levelling up
Open code is the best textbook. We write our projects to be readable and well-documented so others can learn from them.
European values
Open standards, user rights, and data sovereignty are core to how we build. Transparency is not optional — it is structural.
What we have released
Our open source projects
Audiocate
An audio encoding authentication library that embeds cryptographic proofs into audio to verify it came from a trusted source. Uses LSB steganography and TOTP to combat AI-generated deepfakes, with support for real-time streaming pipelines.
HASTL
Haskell • Alpine.js • Servant • Tailwind • Lucid
A production-ready web application starter template built with Haskell and htmx. Type-safe APIs via Servant, modern reactive UI with htmx and Alpine.js, live reloading via GHCID, and integration tests powered by Testcontainers. Free to use, fork, and ship.
More on the way
We are actively working on more open source releases. Libraries, tools, and templates that we use ourselves and think others will find genuinely useful. Watch our GitHub organisation to be the first to know.