RenderDoc is a stand-alone graphics debugging tool
Java/JavaFX/Kotlin Game Library (Engine)
3D Engine with Blender Integration
SwiftShader is a high-performance CPU-based implementation
Real-time physically based rendering engine for Android, iOS, and more
3D Engine c++
A real-time physically based 3D rendering engine for React Native
Open game and rendering engine packed into a JavaScript framework
A free & open-source 2D sprite editor, made with the Godot Engine
Lightweight, high-performance HTML renderer for game developers
The open-asset-importer-library repository
A modern cross-platform low-level graphics API
A real-time 3D engine for DOS-talgics (see GLOBE_3D for new stuff !)
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Vivid3D is a C++ IDE/3D engine, with python scripting.
3D modeler, 3D game maker, 3D demo maker
Modern, lightweight and efficient 2D level editor
3D PBR Texture Painting Software
Bloat-free Immediate Mode Graphical User interface for JVM
Dust3D is a cross-platform open-source 3D modeling software
Tiny OpenGL Wrapper / 3D Engine in C++