3D Engines List:A comprehensive list of 3D graphics engines.
3Dgpl: A Portable Library which provides basic set of tools for writing 3D applications.
Bolt3D: A free real-time 3D graphics library for Windows with features such as gouraud shading, phong shading, texture mapping, and particle systems.
Delta3D: An open source full-function game engine appropriate for a wide variety of modeling and simulation applications.
Expression 3D Toolkit: A free Object Oriented 3D toolkit. It is written in C++/STL. It has support for interactive 3D graphics using OpenGL and non-interactive sphere tracing.
Gino: A suite of libraries for the development of 3D graphics applications. Available for Delphi, VB, Fortran, C++ and .NET.
Gizmo 3D: A software development kit that can be used in a variety of demanding application development projects.
Glide for UNIX: A project to support 3Dfx Glide API on Posix OS.
GNU 3DKit - Free Software Foundation (FSF): Provides several frameworks to render 3D graphics in a GNUstep environment. Its main purpose is to render any kind of 3D graphics in real-time on commodity hardware, using an optimised scene graph architecture.
Obsisian: A currently unsupported open source 3D virtual world for Linux and OpenGL.
OGRE 3D: A 3D library for OpenGL and/or Direct3D. [Open source, LGPL]
OpenNPAR: Provides a unifying framework for the creation of Non-Photorealistic Animation and Rendering. Images, videos, publications and demos available.
OpenSG: A portable C++ scene graph library for 3D graphics applications. Its main distinguishing features are extensive support for multi-threading, reflectivity and good extensibility. [Open source, LGPL]
Photon 3d Game Engine: A commercial quality real-time 3d game engine written in C++ that features advanced rendering algorithms, support for shaders, a stock material system, and a robust toolset for developers.
PLIB Home Page: A set of libraries that are designed to help developers of interactive 3D applications such as games.
Quesa: A free (LGPL-ed) and open source, high level 3D graphics library which offers binary and source level compatibility with Apple's QuickDraw 3D API.
Read3DS: A 3D Studio file (*.3DS) reader and C++ X11 3d engine for Unix.
The Lightfeather 3D Engine: A free and open source 3D library for MacOS X, Windows and Linux.[zlib/libpng]
VCG Library: A portable C++ templated library for efficient manipulation, processing and displaying with OpenGL of triangle and tetrahedral meshes.
Velocity 3D: Source code for an entirely software 3D-engine and a DirectX 3D-engine, along with screen shots, downloads and documentation.
Virtools: Tools for the development of 3D graphics, primarily for use with development of online applications.