LibreCAD

Drawing mechanical or architectural 2D plans with AutoCAD is pricey and heavy. LibreCAD is the open alternative: a free, open-source, cross-platform 2D CAD application for mechanical, architectural, and engineering drawings.

Features

2D CAD: Draw engineering plans.

Pro Features: Layers, blocks, dimensions, snap.

DXF Format: Standard format support.

Cross-Platform: Windows, macOS, Linux.