1.  DizzyWood - http://dizzywood.com/

Dizzywood is an exciting virtual world for kids with imaginative places to explore, exciting secrets and stories to discover, and fun games to play, including puzzles, arcade games, dress-up games, and much more.

2.  Panfu - http://www.panfu.com/

Panfu is a friendly, virtual world, in which children can play online games, have fun, learn Spanish easily and make new friends.

3.  Zanpo - http://www.zanpo.com/

Zanpo is an online game, virtual world, and social network. There are many cities in Zanpo, each with its own unique architecture and community. Build your own virtual world!

4.  Lively by Google - http://www.lively.com/html/landing.html

Create an avatar and chat with your friends in rooms you design. Chat and interact with your friends in rooms you design. Customize your avatar and stream personal photos and video. Invite your friends to chat and help decorate.

5. Vivaty - http://www.vivaty.com/

Vivaty is a fun way to socialize and share your web stuff in a personal virtual scene. No big downloads - it’s all in the browser. Try it with your friends!

6. Yoowalk - http://www.yoowalk.com/

Yoowalk is a no-download virtual world which lets you browse the web, connect with friends, and design your own space in a live 3D environment.

7. Twinity - http://www.twinity.com/en

Twinity is a 3D online world that links the real with the virtual world based on realistic replicas of the world’s most vibrant metropolises in 3D.