Depends on your age. I'd say for ages 13 and up sites like:
IMVU
Miniplanet on facebook
attached sites on those
Younger would be maybe:
Planetcazmo
Barbie
Webkinz
Also, check for other websites attached on sites like Gamepost, most of them are good
I think some good virtual game sites for tweens are fantage, movie star planet, club penguin, and more.
I think Imvu is fairly good and maybe weeble.
Yeah, I'd recommend babydow.comThat's cool
Toontown, virtual pets world, and marapets. Thats all I can think of virtual pets things.
naruto-arena or soul- arena fusion fall
moshi monsters is good for girls and boys so is secret builders and games2girls.com
Probably the top ten virtual world games!SmallworldsBinweevilsclub penguinmoshi monstersWebkinzPandandamydinosStardollIMVUPoptropica
Dream of Mirror Online Angels Online Warrock
Xivio.com is great! Its a 3D no download free virtual world!!!
virtualfamilies.com
wizard 101.
imvu