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

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

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

Oregano - oregano - An electrical engineering tool for GNOME

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

PCBWeb - PCBWeb is a 100% free Windows desktop CAD application for designing and manufacturing electronics...