KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Inventor - Inventor is a 3D CAD software that lets you quickly create 3D models with embedded intelligence, intuitive workflows, and optimized performance.
Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
IronCAD - IronCAD is intuitive 3D CAD software that increases efficiency and can be used standalone or to complement an existing design environment.
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.
Ayam - Ayam is a free 3D modelling environment for the RenderMan interface, distributed under the BSD...