Java/JavaFX/Kotlin Game Library (Engine)
3D Engine c++
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
C++ Frontend for the RenderMan Interface
Xj3D is an open-source Java codebase for the X3D Graphics standard.
C++ header-only library that simulates GLSL math
realistic driving simulation + functions for 2D/3D graphics
3D Without Boundaries
GPU Raytracer from scratch in C++/CUDA
Cross Platform Professional Procedural Terrain Generation & Texturing
Lightweight and modular C++11 graphics middleware for data and games
Tao3D is a programming language for real-time interactive 3D
Vivid Engine 2 is an open source 3D Engine coded using C# and C++.
3D Charts - Templates for PovRay(TM)
Coin3D Qt GUI Library
A public domain cross platform 3D game
3D .NET engine for Windows, Linux, Mac