The best open source alternative to DraftSight is FreeCAD. If that doesn't suit you, our users have ranked more than 50 alternatives to DraftSight and ten of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to DraftSight are LibreCAD, BRL-CAD, QCAD and CAD Sketcher.
A powerful open-source parametric 3D modeler ideal for mechanical engineering, supporting Python scripting, running on Windows, Linux, and Mac, with modular architecture allowing extensive adaptability and use with scientific computing libraries.
LibreCAD is an open source 2D CAD application for Windows, Apple and Linux. It is based on Qt, which is a leading cross-platform application and UI development framework.
Commands are long winded - commands use not clear - struggles with DWG files
Simple and much faster. Needs to be able to import multiple files at once and be able to set default save types.
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...
QCAD is an application for computer aided drafting in 2D. With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schemas and diagrams.
QCAD is a very basic drawing program without support for blocks and XRefs, which will be sufficient for some people but it is not an alternative to AutoCAD-like drawing programs.
On the plus side it is very cheap!
CAD Sketcher is a free and open-source project looking to enhance precision workflows in Blender by bringing CAD like tools, features and usability to Blender.
MakerSCAD is a web-based parametric 3D design software with a block-based programming language to create objects for 3D printing, animations, games and websites.
Archimedes is a free and open source CAD (Computer Aided Design) software. It is a robust system built over Eclipse’s Rich Client Java Platform fully based on plug ins. This means it is easily extensible but also has a pretty thin core that allows you to select the features you...
SAMoCAD designed to create simple drawings, primarily to architectural drawings. Development of the program is far from complete, but it is already possible to draw. There is partial DXF format support, at the moment almost all drafted in the program can be saved in DXF and can...
2-D engineering drawing editor that supports hierarchical object description. It is inspired by Hewlett-Packard's proprietary HP PIGLET (Personal Interactive Graphic Layout EdiTor), which later became the commercial Graffy editor by DURST CAD.
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Doesn't open DWG files like Draftsight.