Flowlab is a 2D browser editor that uses logic bricks and graphs to make the sprites run, jump, kick, fight and die, making game development a breeze.
While several engines are out there in the wild, much better and complete than Horde3D, this little engine is a rough gem expecting the right person with right skills to make it shine.
Unreal Development Kit is the free edition of Unreal Engine 3.
A few years ago saying that Unity is the best engine for indies would be considered a bold statement and the author labeled as a fan-boy. Today after Unity Technologies announced 2 millions registered users this is the truth.