puppypalsonline.webs.com - It might not be too good but i made it myself so plz try it!
Neopets,Howrse,and Foopets
Yes. Club Penguin.
and there is Animal Jam
adoptme.com superpokepets.com guffins.com virtualpets.com 123peppy.com/animal games chickapets.com well that's all i got and i havent been to any of those so good luck but they are real
Wolf Play
Ourworld, Sims2 and 3, IMVU, virtual families, virtual villagers :D
well there is moshi monster but you are a monster. there is also panfu (your a panda)
foopets.com
Yah there is a website and it's called IAMFAM.COM it is 90% like virtual family. A pretty good website is babydow.com
well there is Club Penguin its really good,moshi monsters,binweevils,moviestarplanet
Toontown
virtual famillies