QGIS Development Team
The Quantum GIS Tethys repository contains a lot of software from OSGeo projects.
GIS Expert Solutions
SmartExporter.DXF for ArcGIS/ArcMap is a seamless integration in ArcGIS/ArcMap.
CMT PC-GIS is a lightweight GIS software solution for MS Windows.
DXF Works allows to extract coordinates and other various data from DXF files.
Guthrie CAD/GIS Software Pty Ltd.
CAD Viewer lets you view, print and convert CAD files.
WinTopo Pro converts images from scanners into vector data.
Convert raster images to vector formats for graphics and GIS tools.
Any DWG Converter
A DWG DXF converter,batch convert DWG to DXF, DXF to DWG without the need of CAD.
MapWindow Open Source Team
MapWindow GIS is a free, extensible geographic information system (GIS).
TerraView is a GIS application built using the TerraLib GIS library.
AvisMap GIS Technologies
AvisMap GIS Engine is the basic development platform for AvisMap GIS suites.
My World GIS™ is a GIS designed specifically for use in middle school.
RAMAS GIS is designed to link your GIS with a metapopulation model.
MapWindow 6 Desktop GIS is a lightweight open source desktop GIS.
AutoDWG DWG Converter
DWG DXF Converter lets you batch convert DWG Files into DXF files.
AnyDWG Software, Inc.
Any DWG DXF Converter lets you convert between DWG and DXF files.
Total PDF to DXF Converter converts PDF files to editable DXF files.