SketchUp - 3D for Everyone
AutoCAD MEP - AutoCAD MEP software helps you draft, design, and document building systems.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
DataCAD - DataCAD is a computer-aided design and drafting software for 2D and 3D architectural design and drafting
DraftSight - Discover Dassault Systèmes®' DRAFTSIGHT™ Professional CAD software that lets you create, edit, view and markup any kind of 2D drawing. Learn more here.
AutoCAD Arch - Design and document more efficiently with the AutoCAD Architecture toolset, created specifically for architects.