One of the most high-powered, full-featured open source applications is Blender 3D. It's an incredibly powerful 3D modelling application that has been used to make short films like Big Buck Bunny and Elephant's Dream. So what do all those 3D characters do after their film careers end? They get jobs in computer gaming. Using all of the models and landscapes from Big Buck Bunny, the blender community has created Yo Frankie!, a 3D game with very impressive graphics, that is free for anyone to download and play.