LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Regard3D - Regard3D is a free, multiplatform, open-source structure-from-motion application.
FreeCAD - An open-source parametric 3D modeler
Pix4Dmapper - Photogrammetry software for professional drone-based mapping, purely from images.
SketchUp - 3D for Everyone
RealityCapture - RealityCapture is a software solution which automatically produces high resolution 3D models from photographs or laser-scans.