Unity - The multiplatform game creation tools for everyone.
Putty3D - SCULPT ANYTIME, ANYWHERE
Godot Engine - Feature-packed 2D and 3D open source game engine.
CAD Exchanger - View, explore and convert 3D CAD data on desktop, web and mobile. Read and write Solidworks, STEP, JT, STL and 30 other 3D formats. Applications for end-users. SDK's and tools for software developers. Custom development services for businesses.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.