Design for Fabrication - Design for Fabrication is a leading BIM (Business Information Management) software system designed by Dassault Systems.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Trimble Connect - Trimble Connect is a collaboration tool specially designed for Architecture, Engineering and Construction professionals such as architect, sub-contractors and project owners.
FreeCAD - An open-source parametric 3D modeler
EcoDomus - EcoDomus is an all-in-one Building Information Management (BIM) software solution that offers lots of building improvement tools for real estate owners and tenants.
SketchUp - 3D for Everyone