- GHDL - open-source simulator for the VHDL language. GHDL allows you to compile and execute your VHDL code directly in your PC.
- Icarus Verilog - open-source Verilog simulation and synthesis tool.
- GTKWave - GTK+ based wave viewer for Unix, Win32, and Mac OSX.
- OpenCores - promote collective design and publication of gateware projects under license schemes suitably modelled for such Intellectual Properties (IP) Cores.
- Wishbone - System-on-Chip (SoC) Interconnect Architecture for Portable IP Cores.