HEATKEYS

CADTutor provides free video tutorials, articles, downloads and a busy community forum for users of AutoCAD and associated software.

Autodesk User Group International (AUGI) discussion forums.

Download free cad software for view and drawing .dwg files,2D and 3D cad design software for architectural,house design,Manufacturing,mechanical engineering.

Altiva Software is the only company dedicated to 100% CAD standards conformance, and CAD standards, including the NCS CAD standard, US National CAD Standard, National CAD Standards, CAD Data Standards, CAD Data Standard, CAD Standards Management, CAD...

Be Communities is a social networking site for those in the architecture, engineering, construction, operations, and GIS communities with tools such as forums, blogs, a resource gallery, and a wiki for connecting, communicating, and learning from eac...

TheSwamp - Index

The Number One Site for CAD-Duct Solids Users and Building Services Co-ordination Engineers..

Convert PDF to editable DWG file on-line totally FREE. The conversion quality will be very nice and crystal clear; lines and arcs are removable or editable, same as the native AutoCAD drawing.

Esri is the world leader in GIS (geographic information system) modeling and mapping software and technology. This site features GIS mapping software, desktop GIS, server GIS, developer GIS, mobile GIS, GIS Web services, business GIS, Internet mappin...