#bochs!!!!uses-nonfree![hardware-emulator pc][x86_32/x86_64][firmware no-need][software free] support GNU/Linux
#darling!!!!uses-nonfree![compatibility-layer darwin][arch various][software free] build software with GCC
#desmume!!!!uses-nonfree![hardware-emulator nintendods][arch arm32][firmware optional/technically-free][software free] support GNU/Linux
dgen-sdl!!!!uses-nonfree![hardware-emulator megadrive][arch m68k_16][firmware no-need][software technically-free] build software with GCC and WLA_DX
#dolphin-emu!!!!uses-nonfree![hardware-emulator nintendo-various][arch ppc32][firmware optional/technically-free][software free] support GNU/Linux
#dosbox!!!!uses-nonfree![os-emulator dos][arch x86_16/x86_32][software free] build software with GCC
fceux!!!!uses-nonfree![hardware-emulator famicom][arch mos6502_8][firmware need(famicom-disk)/technically-free][software technically-free] build software with DASM
gens-gs!!!!uses-nonfree![hardware-emulator megadrive/32x][arch m68k_16/sh2_32][firmware optional(need-various)/technically-free][software technically-free] build software with GCC and WLA_DX
gens!!!!uses-nonfree![hardware-emulator megadrive][arch m68k_16][firmware no-need][software technically-free] build software with GCC and WLA_DX
hatari!!!!uses-nonfree![hardware-emulator atari-various][arch mos6507_8][firmware no-need][software technically-free] build software with DASM and WLA_DX
#icecat!!!!uses-nonfree![hardware-emulator phone/tablet][arch various][firmware no-need][software free] support GNU/Linux (Gecko Engine OS)
#iceweasel!!!!uses-nonfree![hardware-emulator phone/tablet][arch various][firmware no-need][software free] support GNU/Linux (Gecko Engine OS)
#libhybris!!!!uses-nonfree![compatibility-layer replicant][arch various][software free] build software with GCC
#lxdream!!!!uses-nonfree![hardware-emulator dreamcast][arch sh4_32][firmware need/free][software free] support GNU/Linux; free firmware reios https://github.com/reicast/reicast-emulator
mednafen!!!!uses-nonfree![hardware-emulator various][arch various][firmware optional(need-various)/technically-free][software technically-free(free-for-some)] build software with GCC, DASM and WLA_DX; http://kuwanger.net/projects/
mgba-qt!!!!uses-nonfree![hardware-emulator gba/gameboy][arch arm32/z80_8][firmware optional/technically-free][software technically-free(gba-is-free)] build software with GCC and WLA_DX; http://kuwanger.net/projects/
mgba-sdl!!!!uses-nonfree![hardware-emulator gba/gameboy][arch arm32/z80_8][firmware optional/technically-free][software technically-free(gba-is-free)] build software with GCC and WLA_DX; http://kuwanger.net/projects/
mupen64plus!!!!uses-nonfree![hardware-emulator n64][arch mips64][firmware no-need][software technically-free] build software with GCC
pcsx2!!!!uses-nonfree![hardware-emulator ps2][arch mips64][firmware need/technically-free][software free] support GNU/Linux
ppsspp!!!!uses-nonfree![hardware-emulator psp][arch arm32][firmware no-need][software free] support GNU/Linux
ppsspp-qt!!!!uses-nonfree![hardware-emulator psp][arch arm32][firmware no-need][software free] support GNU/Linux
#q4wine!!!!uses-nonfree![frontend] wine frontend
#qemu!!!!uses-nonfree![hardware-emulator various][arch various][firmware optional(need-various)/free][software free] support GNU/Linux (some not, build software with GCC)
#qemu-launcher!!!!uses-nonfree![frontend] qemu frontend
#qtemu!!!!uses-nonfree![frontend] qemu frontend
#reicast!!!!uses-nonfree![hardware-emulator dreamcast][arch sh4_32][firmware optional/free][software free] support GNU/Linux; free firmware reios https://github.com/reicast/reicast-emulator
stella!!!!uses-nonfree![hardware-emulator atari2600][arch mos6507_8][firmware no-need][software technically-free] build software with DASM and WLA_DX
vbam-sdl!!!!uses-nonfree![hardware-emulator gba/gameboy][arch arm32/z80_8][firmware optional/technically-free][software technically-free(gba-is-free)] build software with GCC and WLA_DX; http://kuwanger.net/projects/
vbam-wx!!!!uses-nonfree![hardware-emulator gba/gameboy][arch arm32/z80_8][firmware optional/technically-free][software technically-free(gba-is-free)] build software with GCC and WLA_DX; http://kuwanger.net/projects/
vice!!!!uses-nonfree![hardware-emulator comodore][arch mos6502_8][firmware no-need][software technically-free] build software with DASM
#wine!!!!uses-nonfree![compatibility-layer reactos][arch various][software free] build software with GCC
yabause-gtk!!!!uses-nonfree![hardware-emulator saturn][arch sh2_32][firmware optional/technically-free][software technically-free] build software with GCC
yabause-qt!!!!uses-nonfree![hardware-emulator saturn][arch sh2_32][firmware optional/technically-free][software technically-free] build software with GCC
zsnes!!!!uses-nonfree![hardware-emulator superfamicom][arch mos6502_16][firmware no-need][software technically-free] build software with WLA_DX