1. The multiplatform game creation tools for everyone.

  2. Unreal Engine 4 is a suite of integrated tools for game developers to design and build games, simulations, and visualizations.

  3. Blender is the open source, cross platform suite of tools for 3D creation.

  4. "With GameMaker, I went from no programming knowledge to full-time developer in 2 years!" Seth Coster - Butterscotch Shenanigans - Crashlands. "GMS 2 is absolutely amazing and I cannot get over how great this software is to use".

  5. GDevelop is an open-source game making software designed to be used by everyone.

  6. Polycode is a C++ and Lua framework for building interactive applications.

  7. Make iOS (iPhone/iPad), Android, Flash, Windows & Mac games without code using Stencyl.

  8. The most powerful game development platform is now available to everyone. Full engine source code.

  9. Feature-packed 2D and 3D open source game engine.

  10. Urho3D is a lightweight, cross-platform rendering and game engine implemented in C++ and released...

  11. Make your own PC game with RPG Maker. Our easy to use tools are simple enough for a child, and powerful enough for a developer. Try it free today!

  12. Cocos2d-x is an open-source and cross platform open source free 2D game engine for mobile game development known for its speed, stability, and easy of use