3D Without Boundaries
FlightGear Flight Simulator: free open-source multiplatform flight sim
XFLR5 is an analysis tool for airfoils, wings and planes
a parametric 3D CAD modeler
3D Engine c++
2D & 3D TeX-Aware Vector Graphics Language
3D fractal rendering software
Kokua is a V3 based open source metaverse viewer project.
Odamex is a free, cross-platform, modern client-server Doom engine
A Cross Platform and Open Source Electronics Design Automation Suite
mrv2 - Professional player and review tool for VFX, animation and CGI
Numerical and Symbolic Math Tool
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Flipbook, Image Viewer and Audio-Video Player