Google Earth Pro - Google Earth Pro allows you fly anywhere around the earth to view satellite imagery, maps, 3D building, and terrain, from galaxies in outer space to the canyons of the ocean.
AutoCAD LT - AutoCAD LT is a drafting tool to create 2D drawings.
QGIS - QGIS is a desktop geographic information system, or GIS.
progeCAD - progeCAD is DWG/DXF-native CAD software, built for professional drafting.
CloudCalc - CloudCalc provides free cloud based structural analysis software.
iCADMac - User friendly 2D/3D CAD software for MAC OS X, which reads and writes DWG format drawing files.