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.

Logisim - Logisim is an educational tool for designing and simulating digital logic circuits.

Circuit Simulator - Animated electronic circuit simulator using ideal components to visualize voltage and current.

Digital - A simulator for digital circuits.

Solve Elec - Solve Elec is a free educational program to draw and analyze electrical circuits.

Logicly - - Design circuits quickly and easily with a modern and intuitive user interface with drag-and-drop...