Vectary - Vectary is a free, online 3D modeling tool and sharing platform.
Unity - The multiplatform game creation tools for everyone.
Modelo - 3D design collaboration reimagined
Godot Engine - Feature-packed 2D and 3D open source game engine.
VR Sketch - A tool for designers to draw inside virtual reality
Blender - Blender is the open source, cross platform suite of tools for 3D creation.