Verge3D - Practical framework for creating 3D Web applications
Unity - The multiplatform game creation tools for everyone.
Sketchfab - Sketchfab is an industrial design software tool is useful for ideation and for beginners in the industrial design field.
Godot Engine - Feature-packed 2D and 3D open source game engine.
PlayCanvas - PlayCanvas is an open-source game engine built on WebGL and WebVR.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.