FreeRealms

FreeRealms is an online fantasy world where you can hang out and complete quests with your friends. You can also adopt pets and switch skills ranging from soccer player, adventurer, brawler, etc.

ToonTown Online

ToonTown is an online, wacky place where you can create your own toon and battle robots (who can't take a joke) with your friends.

Poptropica

PopTropica is an online strategy game that will test your wits to see if you can solve each mystery on each island. Gameplay revolves around solving puzzles.