SceneDraw 

SceneDraw is an investigative tool, for police and private investigators that need to survey and diagram scenes for criminal and civil litigation. Scene Draw is not a CAD program nor is it a drawing program, it is a Data Driven Diagram software.
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Auto CAD to PDF Converter 

AutoCAD to PDF Converter is a batch converter that allows you to convert AutoCAD DWG to PDF, and DXF to PDF without the need of AutoCAD.
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MITCalc -Rolling Bearings Calculation II 

Selection, calculation and check of rolling bearings (inch versions). Application supports Imperial and Metric units, is based on SKF, ISO, ANSI, SAE standards and support many 2D and 3D CAD systems
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hsCADence 

hsCADence is a CAD document conversion tool. It converts to/from DWG/DWF/DXF, supports six different CAD file versions (r12, r13, r14, AutoCAD 2000, 2004, 2005), exports to PDF, BMP and JPEG, and supports command line scripting and batch processing.
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PDF 2 DXF 

Do you get PDF files with CAD drawings inside? Now you can extract these drawings and save it as DXF file and open it in you CAD application. PDF 2 DXF can open PDF files and save all vector objects as DXF file. Now it also converts text objects!
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Fast Plans 

CAD floor plan design software, very easy to use - takes care of drawing and MATH - leaving you to design
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