IOS

Homepage: http://www.apple.com/ios/

Apple, Inc.'s mobile operating system.

Officially, Objective C is the premier language for developing iOS apps, though Apple has revised its policy to allow other languages.

C and C++ can be grandfathered into an Objective C application.

Ruby is often used to write iOS apps, via RubyMotion.

Python can be used for iOS apps, via PyObjC or Kivy.

iOS apps can be written in Lisp via Nu.