Club Penguin, VMK, AdoptMe, and i dont know any more. But to find some, you could try Stumbleupon, or do a basic search on a web browser. ex. Virtual Pet games
Some websites like Neopets are :Webkinz.comShiningstars.comBuildabearville.comClubpenguin.comMillsberry.comMarapets.com is closest to Neopets (but IDK ( I don't know ) if there is a website better than Neopets! :D)
there are many other websites like neopets, one is webkinz
Marapets
zwinky and neopets are both diffrent. zwinky has people neopets have animal like creatures.
Club Penguin Marapets Moshi Monsters
You can try searching for Shugo Chara Neopets user lookup layouts on websites like The Daily Neopets, Neopets HQ, or Jellyneo. You may also find some users who create custom layouts on the Neopets forums or through their user shops.
I belive gaming websites like neopets also google is a big one too.
I hate Neopets, but there are some games I like better: Marapets.com
Pet pet park is one.
there is neopets. weeworld fantage msn fbfkids
there is fish land or neopets they are both like marepets
Neopets, for sure is a website very close to Marapets.