Simple examples for LambdaCube:

lambdacube-basic: you can move the camera with mouse and arrow keys, plus shift for faster movement
lambdacube-cameratrack: camera tracking and animated textures

Check out the website for further details:

http://www.haskell.org/haskellwiki/LambdaCubeEngine

Disclaimer: this is a huge mess for the moment, don't be surprised if things don't work as expected. ;)