- Michael Kohn (http://www.mikekohn.net/)
- Core assembler + assemblers, disassemblers, and simulators not mentioned below.
- Joe Davisson (https://github.com/Mortis69)
- 6502 assembler, disassembler, simulator.
- 65C816 assembler, disassembler.
- Lars Brinkhoff (https://github.com/larsbrinkhoff)
- PDP-8 assembler, disassembler.
- Zoltan Csahok (https://github.com/zcsahok)
- D.L. Karmann
- STM8 simulator
- Malik Enes Safak
- 1802 simulator