Autodesk AutoCAD - Autodesk AutoCAD is a commercial computer-aided design (CAD) and drafting software application.
FreeCAD - An open-source parametric 3D modeler
CADian - 2D/3D CAD provides a high degree of compatibility with the AutoCAD command set, as well as AutoLISP...
DraftSight - Discover Dassault Systèmes®' DRAFTSIGHT™ Professional CAD software that lets you create, edit, view and markup any kind of 2D drawing. Learn more here.
Cura - Cura aims to be a end solution for personal 3D printing with RepRap based machines.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.