nanoCAD - nanoCAD is a pro-grade 2D CAD system with native DWG support and full customizability.
Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
OpenSCAD - OpenSCAD is a software for creating solid 3D CAD objects.
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
DraftSight - Discover Dassault Systèmes®' DRAFTSIGHT™ Professional CAD software that lets you create, edit, view and markup any kind of 2D drawing. Learn more here.
LTspice - LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.