Originally posted by prosoccerI got a few:
This is a pretty good one I found. If any of you have others, feel free.
http://home.no.net/ronnell/chessproblems/chessmain.html
http://chessville.com/downloads/downloads_tactical_exercises.htm
You need a chess program for that and download the .pgn files.
http://chess.about.com/library/ble63ndx.htm
http://www.logicalchess.com/resources/lessons/tactics/
There's also this other great site with lot of puzzles.
http://www.academicchess.org