RetroArch is a frontend for emulators, game engines and media players.
A cross-platform PSP emulator
Embeddable unity game engine view for Flutter
MAME Android Emulator.
Multi-threaded game engine for Android
PC-98 emulator for Android phones
Gameboy Advance emulator for Android phones
NES emulator for Android phones
Gameboy and Gameboy Color emulator for Android phones
Atari emulator for Android phones
Modified Pokemon games for emulators or devices.