Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Microsoft 3D Builder - View, capture, personalize, and print 3D models.
MatterControl - MatterControl is a free, open source app that lets you organize and manage your 3D prints.
ArCADia-Architecture - ArCADia-Architecture is a revolutionary component for the instant creation of architectural documentation and object drawing.
Onshape - Onshape is the first full-cloud 3D CAD system. It runs in a web browser and on any mobile device.
Vectorworks - Vectorworks 2D / 3D CAD and BIM software for Mac or Windows provides one flexible solution for your entire design process. Sketch, model, and present with the ultimate software from start to finish.