Toribash
GIMP, photoshop, blender, 3ds, maya, etc.

GIMP instructions: http://forum.toribash.com/showthread.php?t=262252
PS: http://forum.toribash.com/showthread.php?t=141572

Blender: Create a uv sphere, unwrap and map texture, add rotation keyframe on frame 1, skip forward 60 frames and rotate sphere on Z axis 360 degrees and add keyframe. Render frames 1-59, compile in to a gif.
<Faint> the rules have been stated quite clearly 3 times now from high staff