Hennin is a classic Snood clone puzzle game. Written in Lua and using the LÖVE 2D framework, Hennin works on Linux, Windows or OSX. It's still very much a work in progress, so don't expect a lot, but it is playable.
At some point I will have full builds of the game available, but until the game is polished enough the only way to play will be to run it manually.
Install the LÖVE framework, clone the repository, cd into its directory and run this command:
$ love .
Follow these instructions: http://www.love2d.org/wiki/Getting_Started
Choose an item from the ToDo list (TODO.md file), create an issue for it and let everyone know you're working on it. Create a pull request and I'll merge it after I take a look. Please make sure your code works before creating a pull request.
Feel free to join #hennin on freenode, but don't expect an instant response :)