QCAD is a free computer-aided design (CAD) software for 2D design and drafting. Developed by RibbonSoft
License: Free Personal
LibreCAD is an open-source 2D CAD application that excels in user customization and community support, while QCAD, though not fully open-source, offers a more user-friendly interface and additional features for 3D design. Users seeking a free and open-source solution may prefer LibreCAD, whereas those looking for commercial support and a more intuitive experience may opt for QCAD.