Know Lua? Interested to try your hand at building an iOS app? Take a look at LuaCocoa, an Objective-C to Lua bridge.
Eric Wing, the creator of LuaCocoa:
LuaCocoa uses BridgeSupport, libffi, and a whole lot of blood, sweat, and tears to bridge both C and Objective-C including objects, constants, enums, functions, and structs. It is similar to PyObjC, RubyCocoa, and JSCocoa.