Open Source Solid Modeling CAD
BRL-CAD is a powerful cross-platform constructive solid geometry solid modeling system that includes an interactive geometry editor, ray-tracing for rendering & geometric analyses, network distributed framebuffer support, image & signal-processing tools.
Ayam is a free 3D modelling environment for the RenderMan interface.
Ignproj is an open source program developed by four students from EPITA, an engineer school in France. This program is able to transform a 2 dimensional map into an 3 dimensional map.
A powerful cross-platform and open-source 3-D rendering engine.
Panda3D is a powerful 3-D rendering engine for many Unix-based and Windows platforms. See the Panda3D home page at https://www.panda3d.org for more information and for forums and downloads. The source code is no longer hosted at SourceForge, but is now available from GitHub: https://github.com/panda3d/panda3d
A fast and lean render engine with multiple renderbackends
TacitPixel is a scalable C++ framework for building application prototypes for interactive collaborative VR/AR applications. It provides a number of features that make prototyping fast and portable. TacitPixel is the successor of the TAP and Twisted Pair engines.
This project provides "small" gadgets for ease of OpenGL programming. GLEB (OpenGL Extension Bridge) enables latest OpenGL features. GLED (OpenGL Extension Dynamo) is GLEB source code generator. GL3DS (OpenGL 3ds file loader) renders 3D model in OpenGL