Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
SolidWorks - Dassault Systèmes SolidWorks Corp. develops and markets 3D CAD design software, analysis software, and product data management software. SolidWorks is the leading supplier of 3D CAD product design engineering software.
Altium PCB Designer - Altium offers a top-notch, best-in-class PCB Designer to give engineers the tools they need to interlink with each side involved in the electronic design process.
FreeCAD - An open-source parametric 3D modeler
Ktechlab - KTechLab is an IDE for microcontrollers and electronics.
SketchUp - 3D for Everyone