NEC PC-8801

QUASI88

• Website
• Target platforms: Windows, macOS, Linux, other Unices
• Source repo (source distributed as tarballs only, binaries also provided but only for Windows)
• Language(s): C
• License: 3-clause BSD

NEC PC-9801

Neko Project II kai

(the "kai" part literally means mod or remix, we'd probably use "NG" or "X" in English; original emu was linked on homepage)

• Website
• Target platforms: Windows, macOS, Linux, Android
• Source repo
• Language(s): C/C++
• License: MIT