Neopets - Neopets is an Amazing, Virtual World, Massively Multiplayer Online, Role-playing and Fantasy-based video game developed and published by Viacom.
Herotopia - Herotopia is a Massively Multiplayer Online, Role-playing, Virtual World and Browser-based video game developed by Herotainment and published by Jagex.
Toontown Rewritten - Toontown Rewritten is a Free to Play, Browser-based, MMORPG, and Virtual-World video game developed and published by Disney.
Panfu - Panfu is really a virtual world focusing on kids aged between 5 and 14.
Webkinz - Webkinz is an Animal-based, Virtual Children’s World, Fantasy and Browser-based Simulation developed by Ganz.
Fishao - Fishao includes the fun of fishing, competitions and also virtual worlds into the one that creates a quite distinctive and enjoyable video game experience.