Objective C

Homepage: http://developer.apple.com/library/mac/navigation/

An extension of C++ based on Smalltalk. The standard language for developing iOS apps. Languages interfacing with Objective C include:
 * Java
 * Nu

A few alternatives exist: Languages with the ability to compile to C/C++ code can be grandfathered into Objective C applications:
 * Lua
 * Ruby
 * C
 * C++
 * Chicken Scheme
 * ECL