1)   The GD&T Trainer: Professional Edition 3.0
Effective, economical GD and T training on CD-ROM. Contains interactive lessons, technical animations, narration, 3D part drawings, course administration tools. Valuable for designers, engineers, and anyone who uses engineering drawings.

 2)   Free DWG Viewer 5.3.0.2
Free DWG Viewer will open and view AutoCAD DWG, DXF, DWF and secure CSF formats. Drawing files can be viewed easily with full zoom / pan / eyeglass / layering controls. The viewer can save views to JPEG, and it supports accurate snap to point

 3)   DWG Viewer 3.06
View AutoCAD drawings with this free DWG/DXF/DWF viewer. The program is a small application wrapped around an ActiveX component. This allows it to run as a Windows application and in your browser.

 4)   MYRIAD 7.0
MYRIAD allows you to share and view all your project files safely and securely, both online and on the desktop. New publishing option allows you to dynamically publish document and 2D CAD views and 3D models to interactive HTML web pages.

 5)   Atrium 4
Atrium is a web-based file sharing tool that allows architectural firms to publish CAD drawings and other documents for team collaboration. Reduces costs and improves efficiencies between architects, engineers, construction, and management personnel.