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

Synopsys VCS - HDL Simulator of System Verilog, Verilog, and VHDL for ASIC design and verification.

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.

Riviera-PRO - System Verilog, Verilog. VHDL, SystemC, HDL simulator targeting ASIC and large FPGA designs.

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

Cadence Incisive - System Verilog, Verilog, VHDL, SystemC HDL Simulator for ASIC Design and Verification