LongLiveTheCube
Free, open-source DXF importer for Blender that converts hatches to meshes, maps layers and detects units.
LongLiveTheCube plugins
LongLiveTheCube has 2 plugins in the catalog for Blender.
LongLiveTheCube
Solves camera focal length and rotation from a photo's parallel lines and places 3D snap points in Blender.