A free and open source multiplatform 3D parametric modeler
The programmer's solid 3D CAD modeller
DXF2GCODE: converting 2D dxf drawings to CNC machine compatible G-Code
An interactive viewer for three-dimensional chemical structures.
Draw vector graphics to scale using a descriptive language
Extensible Line-drawing & Polygon-filling Rasterization Libs for Java
Open Source CAD