Webkinz
Meez
There.com
meez
Yes second life
runescape
Xivio.com is great! Its a 3D no download free virtual world!!!
no
FreeRealms is a site where you must download it but it is totally free.
There are 2 that i know of dragonopia and evodragon
Poptropica
There is no world like Onverse. All virtual worlds out there are unique in their kind. About downloading, you shouldn't worry. Make sure the world you want to play is safe. Onverse.com is completely safe.
Animal jam.com and moshi monster.com also clubpenguin.
Sorry but no .
not really, but if you have an HP computer go to the game section and type Virtual families. you can play for 4 times free and no downloading! try it!