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Inventor - Inventor is a 3D CAD software that lets you quickly create 3D models with embedded intelligence, intuitive workflows, and optimized performance.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
FreeCAD - An open-source parametric 3D modeler
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Ayam - Ayam is a free 3D modelling environment for the RenderMan interface, distributed under the BSD...
EasyEDA - EasyEDA - Web-based EDA suite; runs in browser.