LuaCraft is a mod where you write Lua code to interact with the Minecraft world. It uses the LuaJ library modified by OpenComputers (MightyPirates).

https://www.youtube.com/watch?v=8VEdtQLuLO0&feature=youtu.be

For more details update more often refer to the Forge Forums: http://www.minecraftforge.net/forum/index.php/topic,14048.0.html