LibreCAD

LibreCAD (originally QCad then CADuntu) is an open source 2D CAD application for Windows, Apple and Linux. It is based on Qt, which is a leading cross-platform...

• You can't seem to draw rectangles and there is no way to change dimensions in an object box which is one of the best things about vectorworks in my opinion. Guest • Nov 2018 Disagree   Agree

Free Open Source Mac Windows Linux PortableApps.com

VARKON

Varkon is a very powerful parametric 2D/3D CAD, modeling and application development tool for engineering, design, architecture, etc. It does 2D drafting, 2D and 3D...

• Discontinued
  The project seems no longer developed. Last version, 1.19E, released in November 2012, can be still downloaded from SourceForge.

Free Open Source Windows Linux

MakerSCAD

Powerfull 3D design tool for 3D printing, virtual reality and game engine. Exports to STL, OBJ, and HTML5 3D websites.

Freemium $ $ $ Open Source Mac Windows Linux Web Chrome OS

SelfCAD

SelfCAD is a browser-based 3D CAD/CAM software designed for the 3D printing community. It includes a 30,000+ library of guaranteed printable objects which can be...

Commercial $ $ $ Mac Linux Web Chrome OS