Yeah there's a lot actually.

What platform do you run?

For PPC Games:

http://www.freewareppc.com/games/games.shtml

This one looked like fun http://www.freewareppc.com/games/pie...redition.shtml

For Palm OS games:

http://www.freewarepalm.com/games/

If you're into strategy games check out this one:
http://www.freewarepalm.com/games/me...roesfree.shtml