Java/JavaFX/Kotlin Game Library (Engine)
crossplatform multithreaded object-oriented render and audio engine
Viewer and exporter for Unreal Engine 1-4 assets
Vivid is a modern C++ 3D engine using OpenGL4+
3D Heritage Online Presenter
A WebGL-based 3D engine for technical visualization
a free program for viewing / morphing / animate obj 3ds mesh objects
Get as many FPS as you need and amazing effects by rendering HTML/CSS
simple 3d scene viewer for windows/linux/android
Megalui: 2D/3D OpenGL & C/C++ Library for Scientific Visualizations
diagrammatic 3D in a web browser using SVG
A simple web interface for Blender, for rendering animations..