Addicting Games
Website provides 1300 plus addicting games to play online without registration.
http://www.addicting-games.org.uk

MiniClips
Miniclips.biz offers a huge collection of free mini clips. Enjoy their great selection of action miniclips, shooting mini clips, sports, racing, and much more! New miniclips are added every day! No registration or download is required. No matter what kind of mini clips you like to play, you will definitely enjoy your free time with all the choice of miniclips they have to offer.
http://www.miniclips.biz

OnlineFlashGames.org
Play puzzle games, action games, escape games, flash games and more. Find new free games every day.
http://www.onlineflashgames.org/

Playable Free Online Games
Play free online flash games at this website. This game site offers the best free online flash games. The flash games are of different types such as action, adventure, arcade, dress up, racing, shooting and more.
http://www.playablefreeonlinegames.com

Played Online
Play more than 1,300 free games, including typing games, strategy games, tower defense games, Fishdom, Tetris and much more.
http://www.playedonline.com/