AddictingGames.com

MiniClip.com

ArmorGames.com

Play-free-online-games.com

GoodExperience.com

PopCap.com

GameOldies.com

FreeOnlineGames.com

Shockwave.com

http://www.candystand.com/index.do

http://www.liberatedgames.com/gamelisting.php

http://www.arcadetown.com/

http://www.nitrome.com/

http://www.gamedesign.jp/index_en.html

http://www.newgrounds.com/

http://www.planetfreeplay.com/

http://www.andkon.com/arcade/

http://www.gamegecko.com/

http://www.excessively.net

More Free Downloadable Games

http://esgameservers.com/freepcgames.html

http://osswin.sourceforge.net/games.html

http://freewaregames.net/

http://www.dosgames.com/

http://www.bestoldgames.net/eng/

http://en.wikipedia.org/wiki/List_of_commercial_games_released_as_freeware

http://www.liberatedgames.com/gamelisting.php

http://www.acid-play.com/

http://www.gametap.com/

http://www.ijji.com/