via http://www.aep-emu.de/
Marat Fayzullin has ported his (commercial) MasterSystem, GameGear, SG-1000, SC-3000 and SF-7000 emulator MasterGear to the Android platform: MasterGear for Android
Quote:
New in 2.6.10:
- Added new portrait mode virtual joystick.
- Added configurable custom key mappings.
- Added optional haptic feedback.
- Application now defaults to "auto" screen orientation.
- Finally fixed Samsung Galaxy S2 issues.
