3D Rubik's cube game

 GNUbik is an interactive, graphical, single player puzzle. This free
 program renders an image of a cube, like that invented by Erno Rubik.
 You have to manipulate the cube using the mouse. When each face shows
 only one colour, the game is solved.
 .
 It uses Gtk+ and/or X11 and Mesa / OpenGL.