Circuit Simulator - Animated electronic circuit simulator using ideal components to visualize voltage and current.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
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.
Autodesk 3DS Max - 3ds Max is software for 3D modeling, animation, rendering, and visualization. Create stunning game enrivonments, design visualizations, and virtual reality experiences.
Solve Elec - Solve Elec is a free educational program to draw and analyze electrical circuits.
ZBrush - ZBrush is a digital sculpting and painting software solution.