LÖVE: framework you can use to make 2D games in Lua

LÖVE is an awesome framework you can use to make 2D games in Lua. It's free, open-source, and works on Windows, Mac OS X, Linux, Android and iOS.

License

LÖVE is licensed under the liberal zlib/libpng license. This means that:

It costs nothing. You can use it freely for commercial purposes with no limitations.