Anatomy Arcade

I love this. It's a bunch of games to help you learn anatomy. Poke a muscle is my favorite. It's hysterical, especially when you don't get them all.
http://www.anatomyarcade.com/
Well, it's sort of halloweenish.

Online SET game

Online SET game. Daily puzzle http://www.setgame.com/set/puzzle_frame.htm

There are several games you can play but my favorite is set. It's a matching game. Pretty challenging.

Online SET game

set, game