DeSmuME - DeSmuME is a freeware emulator for the NDS roms & Nintendo DS Lite games created by YopYop156.
RetroArch - RetroArch is a frontend for emulators, game engines and media players.
VisualBoyAdvance - VisualBoyAdvance (VBA) is a free software (GNU GPL) emulator targeted for the Game Boy, Super Game...
Mednafen - Mednafen is a portable, utilizing OpenGL and SDL, argument(command-line)-driven multi-system...
OpenEmu - Console and Arcade video game emulator for macOS.
mGBA - mGBA is an open source emulator of the Game Boy Advance. The goals are speed and accuracy.