Download this app if: you want an emulator for numerous game systems.
Thousands of emulator ROMs (including the NES/FC, SNES/SFC, GBA, MD/Genesis).
This app provide thousands of Emulator ROMs (including the NES/FC, SNES/SFC, GBA, MD/Genesis, PSX). The user interface similar to the android market. it's easy for searching, finding, downloading your favorite Emulator...
Good and always getting better — Has most of the roms you could think of when you download the app. When out comes to some of the more obscure old favorites you may run into a lack of options, but the app is updated regularly (roughly weekly). Also includes emulator suggestions with download links.