gpu-eda/Jacquard

FireSim: Fast and Effortless FPGA-accelerated Hardware Simulation with On-Prem and Cloud Flexibility

Verilator open-source SystemVerilog simulator and lint system

VHDL 2008/93/87 simulator

A collection of classes providing simple hardware specification, simulation, tracing, and testing suitable for teaching and research. Simplicity, usability, clarity, and extensibility are the overarching goals, rather than performance or optimization.

Digital logic benchmark suite

Live Hardware Development (LiveHD), a productive infrastructure for Synthesis and Simulation

Pymtl 3 (Mamba), an open-source Python-based hardware generation, simulation, and verification framework

Yosys Open SYnthesis Suite