Are there any virtual worlds that you can register for without downloading

Here are some great ones there at virtual worlds review!! Active Worlds
Coke Studios
Cybertown
Disney's Toontown
Dreamville
Dubit
Habbo Hotel
The Manor
Mokitown
Moove
Muse
The Palace
Playdo
Second Life
The Sims Online
Sora City
There
TowerChat
Traveler
Virtual Ibiza
Virtual Magic Kingdom
Voodoo Chat
VPchat
VZones
whyrobbierocks
Whyville
Worlds.com
Yohoho! Puzzle Pirates

Second Life
The Sims Online
Sora City
There
TowerChat
Traveler
Virtual Ibiza
Virtual Magic Kingdom
Voodoo Chat
VPchat
VZones
whyrobbierocks
Whyville
Worlds.com
Yohoho! Puzzle
Pirates