I know of a couple of websites. One is called gaiaonline and the other is called imuv, though the latter of the two is made to be a bit more suggestive.
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!
There a number of websites on which you may play avatar games. One such website is the nickelodeon website (http://nicktoons.nick.com/games/avatar-games/), where a good deal of avatar content and clips may be found in addition to games. Further, http://avatarthelastairbenderonline.com/ is an unofficial avatar fan site, which has many articles, clips, and games.
Meez.com. it's a website where you can create an avatar, chat with friends, and play games too.
#
A link to an avatar website is attached.
You can't play Avatar High, because it is either it has moved to a different website, or the website deleted the game.
second life
It is a website to play free games. The games are all under a catigorey like skill games. Dress up is one of them.
well this is not really for girls only its for guys too. www.supersecret.com that's the best website ever you can play games earn money buy cloths for your avatar. and you can dress your avatar. its the best website ever.
Play Pink is a website with over 500 free games for girls. The games include adventure, cooking, dress up, fun, kissing, decorating, coloring, and puzzles.
"Zwinky " is a fun, virtual world that teens can communicate on. You can also create an avatar, design your room, and play fun games.
Dress Up Mix, Disney Channel and Girls go Games all offer free online Cheetah Girls dress up games. Disney Channel website also has Cheetah Girls One World games.