Verge3D - Practical framework for creating 3D Web applications
Cyberix3D - Free online 3D Game Maker. Make your own 3D games online!
PlayCanvas - PlayCanvas is an open-source game engine built on WebGL and WebVR.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Sketchfab - Sketchfab is an industrial design software tool is useful for ideation and for beginners in the industrial design field.
Open 3D Engine - Open 3D Engine is an open-source 3D game development engine in real-time.