DICOM Dumper is a free and simple Java-based utility for decoding and dumping the content (Data Elements of the Data Set) of DICOM 3.0-compliant files. Since it is Java-based, it runs on every OS for which a Java Runtime Environment is available.

Domus.Cad Mac
Domus.Cad is an architectural 3D CAD program. It is a tool for the design and modeling of architecture, interior, landscape, and urban spaces.

RasterVect
Vectorizer. Transforms raster images into a vector format. Raster drawing can be imported by scanning original paper drawings. The target vector formats are understood by most common CAD programs that use vector graphics (AutoCAD, Corel Draw etc.).

TigerCad
2D-CAD Primarily for mechanical, architectural and diagramming. For professionals with complex drawings, but also approachable and easy to learn for newcomers. Comprehensive manual and online help. Emphasis on drawing efficiency. Save in DXF.

DMENU for AutoCAD LT
A complete and full menu replacement for AutoCAD LT97, LT98 and LT2000/LT2000i/LT2002, geared towards the 2D ARCHITECTURAL and Interiors disciplines.

AutoQ3D Community
Start right away exploring 3D CAD with this Open Source Free 3D Editor released under the GNU GPL License