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
Logisim - Logisim is an educational tool for designing and simulating digital logic circuits.
Oregano - oregano - An electrical engineering tool for GNOME
Digital - A simulator for digital circuits.
Solve Elec - Solve Elec is a free educational program to draw and analyze electrical circuits.
BOOLR - Open-source digital logic simulator