Digital - A simulator for digital circuits.
Adobe After Effects - Motion graphics and visual effects toolset .
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.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
BOOLR - Open-source digital logic simulator
Effekseer - Effekseer is a tool that allows easy creation of beautiful particle effects for games and movies.