View on GitHub

Lamdu: an open source live programming environment

Typed pure functional programming made easy, learnable, and efficient


Lamdu features immediate feedback, localized type errors, and live execution on top of projectional editing to create a unique programming experiece. See video:


Version 0.7.1 (Release notes):


The current release is a technology preview. The intention is for it to become a competetive, fully-featured programming language and environment but it will still take us a while.

It can, and has been used to create real applications such as web servers and web sites, but we don't yet recommend using it for a production environment.

Similar Efforts

See the list of projects of r/nosyntax.

Contributors wanted!

Lamdu is currently being developed by two developers, Peaker and yairchu. It is an open-source project that we have worked on part-time since late 2011.

If you share our dream and want to help us realize it, join us! A good place to contact us is our gitter chat room.

(btw: you may have also noticed that contribution could help in designing this very web page)