SketchUp - 3D for Everyone
ArchiCAD - ArchiCAD 16 enables BIM modeling with a new green approach to planning. Create anything you need with ArchiCAD's flexible new features for design.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
ARCHLine.XP - BIM / CAD Software for 3D Architectural and Interior Design
DraftSight - Discover Dassault Systèmes®' DRAFTSIGHT™ Professional CAD software that lets you create, edit, view and markup any kind of 2D drawing. Learn more here.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.