Try Onverse, it’s free and growing fast. It’s a social game where you can:

- Get a free apartment, tools to explore with, clothing and furniture to start.
- Hang and chat with friends at dance clubs or your decorated pad.
- Play games, complete puzzles, explore for points.
- Shop downtown in stores that update every hour.
- Own pets from cats and dogs to unicorns and dragons.
- Dress up in crazy costumes from mermaid tails to robots.

Grab your avatar name before it’s taken!

http://www.onverse.com
References :

http://www.iwin.com

Go to the free games tab, there you can play all of those games without any time limits free, forever.

References :
http://www.iwin.com