MySims Kingdom - MySims Kingdom is based upon The Sims series but provides special and extremely different gameplay to the original series making it definitely worth your consideration.
Doodle God - Doodle God puts the power of creation in your hands!
YoWorld (Yoville) - YoWorld or formerly known as Yoville, is an Action, Browser-based, MMO, RPG, Single-player and Multiplayer, Social networking, and Virtual World Simulation developed by Big Viking Games.
Gleamville - Gleamville is a Free, MMORPG, Browser-based, Social Networking, Fantasy and Virtual World Simulation.
Tinierme - Tinierme is a Massively Multiplayer Role-playing, Fantasy, Virtual World, and Browser-based Life-Simulation.
Little Alchemy - Little Alchemy is a Free to play, Browser-based, Puzzle and Education video game created and published by Reckloak.