FreeCAD - An open-source parametric 3D modeler
PlanGrid - The #1 construction app. Used by thousands of companies to save time, money, and ditch paper plans forever.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Fieldwire - The construction app for project and task management in the field.
Onshape - Onshape is the first full-cloud 3D CAD system. It runs in a web browser and on any mobile device.
Matterport 3D Showcase - View Matterport 3D Spaces online and offline.