1) PopCap Games
Come play the best in fun online games at PopCap.com. Play Bejeweled, Zuma, Plants vs. Zombies, and more of the best online games on the internet.
2) Cartoon Network
Cartoon Network is the best place for cartoons! Play hundreds of free games featuring your favorite Cartoon Network characters. Plus, watch full episodes
3) Play Free Games Online
Comprehensive free online game collection with no signup process or complicated steps to play 1300+ games online for free. Classic Nintendo (NES), action
Link: http://www.excessively.net/
4) Yahoo! Games - Games and Online Games
Free online and downloadable games! Play arcade games, board games, card games, puzzle games and other free games at Yahoo! Games.
Link: http://games.yahoo.com/
5) Coffee Break Arcade - Free Games
Play the best FREE games on the web. Select online games from 6 categories including Sports, Shooting, Racing, Classic, Casino and Cool.