Ancient Beast is a FOSS game project that has been in development by Freezing Moon for a couple of years, tantalizing everyone with top notch concept art and 3D models.
After a rather large restructuring in game scope, where they changed from attempting to create a 3D RTS in the Blender Game Engine, to a 2D hexagonal TBS built on HTML5, they have delivered a promising gameplay prototype that offers a mix of Heroes of Might and Magic and Magic: The Gathering's gameplay.
Gameplay currently revolves around summoning creatures and using their abilities to defeat other summoners
Still in heavy development, the game still needs to implement the entirety of its sizable bestiary, as well as adding animated creatures by utilizing the models they have created.
So, if you have any skills in web development, jump aboard and help them complete this awesome game!