Here are all the emulators I know of for Nintendo 64. This section of the site hasn't been updated in a long time but still contains emulators that run on N64 for Gameboy, NES, SNES, MSX-2, and Sega Master System. I would imagine the Master System one probably plays GameGear too, although, I have never tried it. Here is the link.

http://www.zophar.net/consoles/n64.html



A couple simple PD-rom demos.

http://www.zophar.net/roms.phtml?op=show&type=n64



A few Project 64 savestates.

http://www.zophar.net/pj64/



Several small N64 utilities.

http://www.zophar.net/utilities/n64util.html



N64 auditing utilities

http://www.zophar.net/utilities/n64aud.html



N64 Dev Utilities

http://www.zophar.net/utilities/n64dev.html



Other utilities (patchers and misc)

http://www.zophar.net/utilities/mod.html



WinAmp plugin for N64 music

http://www.zophar.net/utilities/usf.html



N64 Plugins (outdated, but a ton of content)

http://www.zophar.net/utilities/n64plugins.html



Well, there was some more N64 stuff for you all. I'll post some more soon i'm sure.