Miniclip - The Best Online Games!
Kongregate - Kongregate has free games that you can play online. Choose from thousands of free flash games.
Newgrounds - A community of artists, game developers, musicians, voice actors and writers who create and share some of the best stuff on the web!
Friv - A safe place to play the very best free games!
Play iDev Games - Play by iDev is the next generation of gaming on the internet.
Ninja Kiwi - Ninja Kiwi, creators of awesome free online games.