Dragons Kingdom is a browser based rpg adventure game.
Some features which DK has to offer:
9 Different skills to level up
4 Quests to complete for rewards
7 Different character class's to choose from
A huge map to explore and venture on
Around 250 different monsters to find and slay
Guilds and Strongholds, which leads to Guild battles!
A Duel Arena, to interact and fight with other players
Many towns and areas to explore. Either within towns, or on the battlefield
A player trading market
An in game Forum and Player Chat
Regular updates
And best of all, it's free!