A Lua mobile-game development framework with a rather strange licensing model (open source with advertising clause; additional cloud services for sale).
Moai is a mobile game development platform. It’s driven by the Lua scripting language, both on mobile devices and in the cloud. The Moai SDK can handle graphics, animation, input, physics, collisions, and more. Moai Cloud hosts your game logic, databases and additional game content, plus key services you need to build and administer great games.