Synopsys VCS - HDL Simulator of System Verilog, Verilog, and VHDL for ASIC design and verification.
Digital - A simulator for digital circuits.
Riviera-PRO - System Verilog, Verilog. VHDL, SystemC, HDL simulator targeting ASIC and large FPGA designs.
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.
VCS - Workforce management software for police & fire departments
BOOLR - Open-source digital logic simulator