A circuit simulator with graphical user interface (GUI)
Real Time Electronic Circuit Simulator.
TimingEditor is a tool to graphically draw and edit timing diagrams.
AVR simulator IDE
SPICE netlist visualizer
Caneda (Circuits and Networks EDA) is an open source EDA software.
TCAD Device Simulator
CMOS circuit minimizer using table lookup
is a Qt program to generate SMD chip shooter code
Boolean Function Optimizer using Quine–McCluskey algorithm