Building a modern functional compiler from first principles. (http://dev.stephendiehl.com/fun/)

A statically typed concatenative systems programming language.

Haskell game engine library for roguelike dungeon crawlers; please offer feedback, e.g., after trying out the sample game with the web frontend at

Extremely modular text editor built in Haskell

A free and open source breakout clone in Haskell using SDL and FRP, with Wiimote and Kinect support.