One Emulator: Free Emulator for Games is an open-source emulator. It's designed to work on a wide range of devices, from phones to TVs, and to provide the best user experience on Android. It's completely free and without ads.
• GB, GBC, GBA
• PSX, PSP
• Arcade (MAME2003, FBNeo)
Keep in mind not every device can emulate every console. A very powerful one is required for more recent systems.
Forked repository: https://github.com/fulldiveVR/FulldiveExtension.FullRoid
Original source: https://github.com/Swordfish90/Lemuroid