LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
DeltaCAD - Powerful, easy to learn 2D CAD (Computer Aided Design) program designed to meet all of your CAD...
KediCAD - CAD/CAM/ FEA software for Linux
QCAD - QCAD is an application for computer aided drafting in 2D.
DualCAD - Freeware cad application that handles the basic needs of most Microstation users
DraftSight - Discover Dassault Systèmes®' DRAFTSIGHT™ Professional CAD software that lets you create, edit, view and markup any kind of 2D drawing. Learn more here.