Pspice - OrCAD PSpice technology provides the best, high-performance circuit simulation to analyze and refine your circuits, components, and parameters before committing to layout and fabrication
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Circuit Simulator - Animated electronic circuit simulator using ideal components to visualize voltage and current.
FreeCAD - An open-source parametric 3D modeler
VeroRoute - Cross-platform software for producing Veroboard (stripboard), Perfboard, and single-sided PCB...
Sculptris - Sculptris: Enter a world of digital art without barriers.