AutoCAD LT - AutoCAD LT is a drafting tool to create 2D drawings.
Autodesk AutoCAD - Autodesk AutoCAD is a commercial computer-aided design (CAD) and drafting software application.
BricsCAD - A powerful CAD platform, with features familiar to you from native .dwg applications.
SketchUp - 3D for Everyone
ActCAD - ActCAD is one Software for many applications covering the primary domains of – Architecture, Engineering, Construction (AEC) including Structural, Electrical, and Mechanical.
Redeye Apps - A common data environment to collect, manage and share engineering information