Some good online avatar based games are Zwinky, Fantage and Second Life. Another good online avatar based game is Habbo.
At the website addictinggames.com you can find avatar games for free. Go to the website and search for avatar. Then pick one that looks fun and play it!
www.Weeworld.com is very fun try it.
Gaia online is one...
There are many websites you can go to, to find out about online avatar games. You can just search the web and it will take you to several avatar games online, and some of the websites allow you to create your own avatar in 3-D.
Some games that give you avatar rewards include Splosion Man and the Halo add-on, Halo Waypoint.
poptropica
Club Penqiun IMVU
Well theirs clubpenguin, YoVille, FarmVille......... that's all i got.
Nintendo Wii!
club penguin moshi monsters
meez
you can buy anything