* [https://zxe.io/software/Z80/ libZ80] Ultra accurate ANSI C implementation
* The [[T80]] is a [[VHDL|VHDL]] implementation of the Z80 and Z80A, finished in 2002 on [[OpenCores|OpenCores]]
* [[arnold]] uses [[InkZ80]], written in C++ (apart from the author-designed C simulation)
* On OpenCores, there is also an ultra accurate [https://opencores.org/projects/a-z80 Verilog implementation of the Z80].