Esenthel

Advanced collaborative cross-platform game engine, editor, and development environment. Native integration with Nvidia PhysX, Oculus Rift, Facebook, AdMob, Recast Pathfinding, Bullet Physics. Used to create games such as Lucius and Dungeon Hero.

3DCrafter

3DCrafter that was formerly known as 3D Canvas is basically a 3D modeling and animation software designed and produced by the Amabilis Software.

Armory3D

Armory 3D is a free and open source game development software developed using Haxe and Kha and made to run inside Blender.

MonoGame

MonoGame is an open source implementation of the Microsoft XNA 4 Framework.

Unity3D

Unity is the ultimate game development platform. Use Unity to build high-quality 3D and 2D games, deploy them across mobile, desktop, VR/AR, consoles or the Web, and connect with loyal and enthusiastic players and customers.

Unreal Engine