Lemuroid is an open-source emulator based on Libretro. It's completely free without ads and focused on ease of use and good user experience.

It's designed to work on a wide range of devices from phones to TVs.

Supported Systems:

- Atari 2600 - A26
- NES
- SNES
- Game Boy - GB
- Game Boy Color - GBC
- Game Boy Advance - GBA
- Sega Master System - SMS
- Sega Genesis - Megadrive - MD
- Sega Game Gear - GG
- Nintendo 64 - N64
- Nintendo DS - DS
- PlayStation - PSX
- PlayStation Portable - PSP

Features:

- Automatically save and restore game states
- ROMs scanning and indexing
- Optimized touch controls
- Quick save/load with slots
- Support for zipped ROMs
- Display simulation (LCD/CRT)
- Fast-forward support
- Gamepad support
- Local multiplayer
- Tilt to stick support
- Touch control customization (size and position)
- No ads

Keep in mind not every device can emulate every console. A very powerful one is required for more recent systems such as PSP and DS.

This application does not contain any games. You need to provide your own legally owned ROM files.