adamrice / #game

http://cardsagainstoriginality.com/

Regex tutorials and tricks

http://fractgame.com/

http://www.drunkmenworkhere.org/201.php?action=play

http://play.typeracer.com/

Turns speed-typing into a competition. Fun, if you're into that kind of thing.

http://www.sudokuslam.com/

Dangerously good web-based Sudoku