Unity - The multiplatform game creation tools for everyone.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Shiva Engine - Shiva Engine is a cross-platform development solution.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
AndEngine - AndEngine is a free android 2D OpenGL game engine.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.