RubyCocoa is a framework for MacOsx that allows CocoaProgramming in the object-oriented ScriptingLanguage Ruby. RubyCocoa lets you write a Cocoa application in Ruby. It allows you to create and use a Cocoa object in a Ruby script. It's possible to write a Cocoa application that mixes RubyLanguage and ObjectiveCee code.
Some useful applications of RubyCocoa: