Autodesk AutoCAD - Autodesk AutoCAD is a commercial computer-aided design (CAD) and drafting software application.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
SketchUp - 3D for Everyone
Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
Redeye Apps - A common data environment to collect, manage and share engineering information
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.