1 : librecad.org : LibreCAD is a free Open Source CAD application for Windows, Apple and Linux. Support and documentation /is = are free from our large, dedicated community of users, contributors and developers. The Qt4 porting was completed eventually during the development of /the/ 2.0.0 series, /The/ = A LibreCAD team is a small group of dedicated people most /important/ = importantly, do what you do best and have fun doing it! JetBrains have = has generously supplied us with CLion licenses for the development of LibreCAD 2 : https://librecad.readthedocs.io/en/latest/ : LibreCAD is a free Open Source 2D CAD application using the cross-platform framework Qt. That means it works with multiple operating systems; Windows, Apple and Linux. Support and documentation /is/ = are free from our large, dedicated community of users, contributors and developers. The user interface is translated /in/ = into over 30 languages. As free software you can redistribute it and/or modify it under the terms of the see GNU General Public License version 2 (GPLv2) as published by the Free Software Foundation. The latest information about LibreCAD can be found at librecad.org. 3: https://wiki.librecad.org/index.php?title=Main_Page : The release of 2.1.0 increased /customization/ = the customization of the user interface. If you wish you get involved in development = the development , we need to complete this part of /implementation/ = the implementation and add the relevant documents. Document writers to help /building/ = to build wiki and user manuals Quality Assurance, It's Finish !!!!!