LibreCAD

LibreCAD is a free open source 2D CAD application available for Windows, Apple and Linux. It is maintained by a dedicated community of users, contributors and developers who also provide free support and documentation. The project began as an effort to build CAM capabilities into the community version of QCad for use with a Mechmate CNC router, and after being ported to Qt4 it was renamed from CADuntu to LibreCAD.

The application focuses on 2D computer-aided design, giving users a no-cost tool for creating and editing technical drawings. Because it is open source, the source code is accessible and the community can contribute to its development. Support channels include an IRC channel, a forum, a chat, a manual, a wiki and a GitHub repository, so users have several ways to find help and documentation.

LibreCAD is suitable for hobbyists, makers, students and professionals who need a free 2D CAD solution, particularly those working with CNC routers or similar hardware. It can serve as an accessible alternative for users who do not want to pay for commercial CAD software, while still offering the core drafting features expected from a 2D CAD tool.

New users should begin with the official manual and wiki, and can turn to the forum or IRC channel when they encounter problems. Those interested in contributing can get involved through the GitHub repository or community discussions. Overall, LibreCAD provides a community-backed, open source option for 2D design work.