To the best of my knowledge (and feel free to add / correct), Rubik's has made the following puzzles:
3x3 (aka Rubik's Cube)
4x4 (aka Rubik's Revenge)
5x5 (aka Professor Cube)
2x2 clear (aka Ice Cube)
Revolution (aka Revo)
Snake (aka Twist)
Miniture keychain versions of cube and snake
Plus a variety of picture cubes, limited edition cubes (like the wooden 30th anniversary cube) and re-released reworked cubes (like the new 4x4).
No longer sold:
XV (aka Rubik's Fifteen)
I guess they stopped selling them because they cost more to make more than they actually brought in from selling them. Same as any other business. And before you ask, I have at least one of every one of these except the last 5 (UFO through to Cheese).
Please take off topic discussion off this forum. Thanks.