There are several open-source alternatives to AutoCAD that offer various features for design and drafting. Some of the best open-source AutoCAD alternatives include:
FreeCAD is a parametric 3D CAD modeler that allows users to design real-life objects of any size. It’s suitable for a wide range of uses, including product design, mechanical engineering, and architecture.
FreeCAD is the most popular Open Source & free alternative to Autodesk AutoCAD
LibreCAD is a free and open-source 2D CAD application that offers a comprehensive set of features for creating technical drawings. It’s especially useful for creating floor plans, diagrams, and schematics.
LibreCAD is based on Qt, which is a leading cross-platform application and UI development framework.
BRL-CAD is a powerful cross-platform open source solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, image and signal-processing tools, a system performance analysis benchmark suite, libraries for robust geometric representation, with more than 30 years of active development.
Though not open-source, DraftSight is a free 2D drafting software that offers similar functionalities to AutoCAD. It supports DWG files and provides tools for creating, editing, and viewing 2D drawings.
Thougn not open-source, DWGSee CAD is a lightweight 2D CAD that have many smart features for drafting, such as dimension driven.
Remember that while these alternatives are powerful, they may have different interfaces and workflows compared to AutoCAD. It’s a good idea to explore and experiment with a few to determine which best suits your specific design and drafting needs.