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LibreCAD is a computer-aided design (CAD) application for 2D design. It is free and open-source , and available for Unix / Linux , macOS , and Windows operating systems. Most of the interface and handle concepts are analogous to AutoCAD , making it easier to use for users with experience in this type of commercial CAD application.
A man using AutoCAD 2.6 to digitize a drawing of a school building. AutoCAD was derived from a program that began in 1977, and then released in 1979 [5] called Interact CAD, [6] [7] [8] also referred to in early Autodesk documents as MicroCAD, which was written prior to Autodesk's (then Marinchip Software Partners) formation by Autodesk cofounder Michael Riddle.
Released under the terms of the GNU General Public License and, optionally, the CDDL for most files of the source distribution, VirtualBox is free and open-source software, though the Extension Pack is proprietary software, free of charge only to personal users. The License to VirtualBox was relicensed to GPLv3 with linking exceptions to the ...