Precision Trigonometry: Advanced Calculator for Complex Math
An open source Java geometry library with a focus on 2D/3D space.
CFDTool - Easy to Use Fluid Dynamics (CFD) MATLAB Toolbox
Open Source Solid Modeling CAD
Free 3D Mobile CAD
View your WKT geometries
GeoData Web Editing [core SIG Web]
MorphoLim : identifying city boundaries
build three dimensional structure
A geometry library for Java
Interactive spherical geometry software.