Gh0st
Australia's finest since 1981
MegaN64 in a Nintendo 64 emulator port to Android OS by Jeffrey L Scott
It does not say which emulator this is based off but I imagine it would be Mupen.
It was last updated a couple days ago (February 13) which is a good sign it's being actively worked on!
MegaN64 is a very fast N64 emulator for Android phones. Play your favorite N64 games on your phone or tablet!
You need to place your own game files onto the SD card before running this N64 Emulator.
For source code licensed by GPLv2, visit http://www.4shared.com/zip/tP7wAJkF/n64_emulator.html
For the license, visit http://www.gnu.org/licenses/gpl-2.0.html.