Unity 3d

Unity 3d is a software tool for the efficient creation of games and interactive applications. It takes full advantage of the latest technologies to offer unprecedented worlds in 3D. By combining a number of tools into one, it reduces game development from years to months.
Unity's motto is "Create once, run on everything!"

Unity is a unique game development tool combining the award-winning Unity enginine, a game content management tool and a 3D editor that makes it easy to organize an entire game scene.
The Unity engine supports shaders, shadow rendering, and a variety of post-processing effects.
The physics engine only complements Unity's high-quality display engine and allows you to take advantage of nVIDIA PhysiX support.
A special terrain and vegetation editor is directly included in the Unity editor itself.
Adding and managing animations, sounds and video is also easy.