Pet Society - Pet Society is a Virtual World Simulation with strong Fantasy, Digital Pet, Single and Multiplayer Elements.
Animal Jam - Animal Jam is really a virtual world for kids that includes real animal and plant information towards fun storylines which are maintained by National Geographic educational content.
WeeWorld - WeeWorld - the social network built for fun where you can meet new friends, send messages, play...
Toontown Rewritten - Toontown Rewritten is a Free to Play, Browser-based, MMORPG, and Virtual-World video game developed and published by Disney.
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.