rufascube
Unique 3D slider puzzle that looks like a rubics cube.
...A 3x3x3 arrangement of cubelets with the center one missing allows sliding permutations. After a randomization, the goal is to restore the cube to its original configuration based on color and alphabetic hints. Written in Ada and compiles on Windows, OS-X or GNU/Linux. Nice laptop controls and support for Mac Retina displays. Requires OpenGL v3.3, and on Macs a recent version of OS-X. Now with mouse wheel zoom (2-finger swipe on MacBooks).
Includes a smaller 2x2x2 version called SevenSlider.
Works on Windows, Macs running OS-X and PCs running GNU/Linux.
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