XCube is a 3D cross-platform Rubik's Cube sim - Time Waster
So as I was looking around for a Time Waster to share with you all today, I came across XCube. It's a 3D Rubik's Cube simulator written in Java, so it will run on any system with the JRE installed. Twist and turn the cube using your mouse to solve the puzzle. You can customize the colors to your liking, and save a game to pick it up later on - handy when you realize that you missed a deadline five minutes ago while you were playing.
Unfortunately there's no way to virtually peel off the stickers. Curse you, virtual reality!