Well, there are so many of them, what i suggest is try choose them from http://mygame.bbgsite.com/ There should have what you need.
Here also some games i would like to recommend for you :D
Runescape, a well-known browser MMORPG
http://games.bbgsite.com/games/runescape...
Runescape is a massive multiplayer adventure, with monsters to kill, quests to complete, and treasure to win. You control your own character who will improve and become more powerful the more you play. The game is multiplayer which means you will meet many other people in the world who you communicate and trade with.
AQ Worlds
AdventureQuest Worlds is a browser-based MMORPG developed by Artix Entertainment in 2008. It is currently under public gamma testing available to everyone. Check out the game through the link: http://games.bbgsite.com/games/aqworlds/
Fragoria http://feature.mmosite.com/content/2008-...
Absolutely NEW browser based MMORPG with amazing quality of graphics and world structure. Very soon Fragoria will be available all over the world. But players can already play absolutely free on the servers in Russia.
zOMG! http://games.bbgsite.com/games/zomg/
zOMG! is a new casual MMORPG that takes the millions-strong community of Gaia Online and brings it to life in the form of a huge virtual with plenty of interesting characters to meet and monsters to battle.
Quake Live
http://gamelist.bbgsite.com/goto/quake_l...
The Browsergame-Conversion of the well known Online-Egoshooter. Choose from a variety of avatars, plenty of weapons and more than 30 Maps to compete against players from all over the world! Quake Live will run without any client, directly on your webbrowser and will offer realtime high detailed 3D-graphics. In addition it will be free of charge and financed completely by ingame-advertising!