Free Browser MMO
Warpfire :The galaxy is not enough... WarpFire is an action game set in outer space. Thousands of Players compete at the same time. All you need is a normal web browser to play.
Katsuro :Creeping shadows and hordes of rebellious warriors destroyed the once blossoming kingdom of Ishimo. Only the followers of the ancient codex of the Samurai could, with the help of the ancient secrets delivered to them by the monks, restore peace to the country. Fight as one of them in Katsuro!
Adventure Quest Worlds :AQWorlds is a 100% browser based game with real time combat, original art, and an entire world to explore. Battle monsters and obtain weapons, armor, pets and items.
GreedInc :GreedInc is a browser based mmo developed by Rampid Gaming. It's Real world crime game like never before. Takeover the world, starting with your real hometown. Rob stores, build in real cities, do missions and fight your way to the top- In GreedInc the real world is the game world. Start in your real hometown and travel around the globe building your empire.