FreeCAD - An open-source parametric 3D modeler
Trimble Connect - Trimble Connect is a collaboration tool specially designed for Architecture, Engineering and Construction professionals such as architect, sub-contractors and project owners.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
SmartBIM Platform - SmartBIM Platform is an all-in-one Building Information Management software that enables building product manufacturers to manage, edit and distribute building related content with ease.
SketchUp - 3D for Everyone
Blender - Blender is the open source, cross platform suite of tools for 3D creation.