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LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
Regard3D - Regard3D is a free, multiplatform, open-source structure-from-motion application.
DeltaCAD - Powerful, easy to learn 2D CAD (Computer Aided Design) program designed to meet all of your CAD...
Pix4Dmapper - Photogrammetry software for professional drone-based mapping, purely from images.
QCAD - QCAD is an application for computer aided drafting in 2D.
ContextCapture - Acute3D develops breakthrough photogrammetry software solutions to automatically turn photos into photorealistic high resolution 3D models