Just stumbled upon some pretty neat free pc games:
1) Sumotori Dreams
http://web.t-online.hu/archee83/sumotori/
This is a hilarious block figure sumo wrestling game. 1st wrestler outside the ring or 1st to hit the ground loses. Here's a vid http://www.youtube.com/watch?v=hOvq3-oG5BM

2)I Wanna Be The Guy (IWBTG)
http://kayin.pyoko.org/iwbtg/downloads.php
Alternate download site (faster download) http://rs16.rapidshare.com/files/786...tgbeta_fs_.exe
This is a ridiculously hard and brutal game that mixes a lot of classic NES games together. The 1st boss is a giant fire-breathing version of Mike Tyson from Punch-Out who punches out the scenery as he tries to annihilate you. Here's a pretty funny vid of a dude trying to beat some of it
(Spoilers!)http://www.youtube.com/watch?v=3ifS4BhrNmI

3) Crayon Physics
http://www.kloonigames.com/blog/games/crayon/
This is an innovative puzzle game in which you draw shapes that come to life to achieve the ultimate goal of making the ball roll into the star.