Puzzled? 
Generates scrambles for the Mini Cube (2x2x2), Rubik's Cube (3x3x3), Revenge Cube (4x4x4), and Professor's Cube (5x5x5).
Usage
Install:
$ gem install puzzled
Play:
> require 'puzzled'
> Puzzled::MiniCube.new.scramble 10
#=> ["U'", "B2", "U2", "D'", "F'", "U'", "D", "F2", "B", "U2"]
> Puzzled::RubiksCube.new.scramble 10
#=> ["F", "D'", "U", "F", "U'", "D2", "F2", "B", "U", "B'"]
> Puzzled::RevengeCube.new.scramble 10
#=> ["L", "R'", "u", "d2", "f2", "D", "B", "b", "r'", "L'"]
> Puzzled::ProfessorsCube.new.scramble 10
#=> ["D'", "F2", "L2", "F", "f", "d", "l'", "F'", "B'", "R"]
Test:
$ git clone git://github.com/huntca/puzzled.git
$ cd puzzled
$ bundle
$ rspec spec