Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
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.
Sculptris - Sculptris: Enter a world of digital art without barriers.