Capcom CPS-1
Capcom CPS-2
Capcom CPS-3
Cave
Data East DEC-0, DEC-8, Cassette System, DECO IC16 and DECO-32 based games
Galaxian based hardware
Irem M62, M63, M72, M90, M92 and M107 hardware
Kaneko 16
Konami
Namco Mappy, System 86, System 1 & 2 and others
Neo-Geo
NMK16
Pacman based hardware
PGM
Psikyo 68EC020 and SH-2 based hardware
Sega System 1, System 16 (and similar), System 18, X-Board and Y-Board
Seta-Sammy-Visco (SSV) based hardware
Super Kaneko Nova System
Toaplan 1
Toaplan 2
Taito F2, F3, X, Z and others
Miscellaneous drivers for lots of other hardware
FB Neo also has WIP console/computer drivers for Sega Megadrive/Genesis, ColecoVision, Sega SG-1000, Sega Master System/Game Gear, MSX-1, ZX Spectrum and also PC-Engine/TurboGrafx 16/SuperGrafx.