OpenSCAD - OpenSCAD is a software for creating solid 3D CAD objects.
FreeCAD - An open-source parametric 3D modeler
Solid Edge - Solid Edge is an industry-leading mechanical design system with exceptional tools for creating and...
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
ArCADia BIM - ArCADia BIM is one of the agile CAD software that proved to be a quiet professional in creating solutions for architecture and construction.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite