Starting window of ResidualVM showing available games.

residualvm

interpreter to play LucasArts' Lua-based 3D adventures

ResidualVM is a cross-platform 3D game interpreter which allows you to play LucasArts' Lua-based 3D adventures (provided you already have their data files):
x86 emulator with Tandy/Herc/CGA/EGA/VGA/SVGA graphics, sound and DOS

dosbox

x86 emulator with Tandy/Herc/CGA/EGA/VGA/SVGA graphics, sound and DOS

DOSBox is a x86 emulator with Tandy/Hercules/CGA/EGA/VGA/SVGA graphics, sound and DOS. It's been designed to run old DOS games on platforms that don't support it.
Hatari running with EmuTOS

hatari

Emulator for the Atari ST, STE, TT, and Falcon computers

Hatari is an emulator for the Atari ST line of computers.
Accurate multi-system emulator

higan

Accurate multi-system emulator

higan is an emulator for systems from Nintendo (SNES, NES, Gameboy, Gameboy Color, Gameboy Advance), Sega (Master System, Game Gear), NEC (PC Engine, SuperGrafx) and Bandai (WonderSwan, WonderSwan Color). It was formerly called bsnes and the SNES emulation is especially complete and polished.
front-end for the Mednafen multi-system emulator

mednaffe

front-end for the Mednafen multi-system emulator

Mednaffe is a graphical front-end for the Mednafen multi-system emulator. It allows all of Mednafen's options to be configured, and provides simple game-management features.
Simple frontend for the libretro library

retroarch

Simple frontend for the libretro library

RetroArch is an open source, multi-platform frontend for the libretro API. It can be used as a modular multi emulator system, game engine, media player and 3D technical demonstration. These features are available through libretro cores.