HEATKEYS

Open CASCADE Technology, an environment for 3D modeling and development of numerical simulation software including CAD/CAM/CAE, AEC and GIS, as well as PDM applications.

GrabCAD - a free CAD model library with 2D / 3D CAD files available for software like SolidWorks, AutoCAD, Autodesk Inventor, Solid Edge, SketchUp etc.

Open source question and answer forum written in Python and Django

The Ultimate Discussion forum for CNC, metal working machines, lathes, vertical milling, CAD/CAM software, hobbyCNC, wood routers, EDM, electronics,metal work and Free Buying and Selling!

Blender Artists is an online creative forum that is dedicated to the growth and education of the 3D software Blender.

OpenGL Developer Web Site

MeshLab Home Page

Comprehensive information on rapid prototyping, rapid tooling, sterolithography and solid freeform fabrication technology products and services. Complete rapid prototyping service bureau listings.

Freebyte, Your guide to the Web. Free software, clipart, images, music, games, jokes, anti-virus, dictionaries, pims, operating systems, programming tools, news, weather, screensavers, ebooks, etc.

We’re developing open source industrial machines that can be made for a fraction of commercial costs, and sharing our designs online for free. The goal of Open Source Ecology is to create an open source economy – an efficient economy which increa...