GoldenEye Counterstrike Multiplayer leveles hack
http://www.goldeneyevault.com/viewfile.php?id=128
GoldenEye Mario and Zelda Multiplayer levels Hack
http://www.goldeneyevault.com/viewfile.php?id=278
Sin & Punishment Translation
http://www.romhacking.net/translations/920/
Wonder Project J2: Koruro no Mori no Josette
http://www.romhacking.net/translations/1074/
Ogre Battle 64 Lycanthrope Fix
http://www.romhacking.net/hacks/561/
A bug fix to a great game. This fixes so that werewolves transform with the moon like in the original Ogre Battle. US version only though.
Goldeneye X (
http://www.goldeneyevault.com/viewfile.php?id=202)
Perfect Dark - modded multiplayer where the sims can use mines, and everyone can use Goldeneye weapons (
http://www.shootersforever.com/forums_message_boards/viewtopic.php?t=5996)
Perfect Dark - modded multiplayer so that the single player levels are playable in multiplayer - not ideal, as the levels mostly aren't suited for mp, plus not all levels work, but it's interesting to see (
http://www.goldeneyevault.com/viewfile.php?id=240)
The same as the above, but with weather in the levels (
http://www.shootersforever.com/forums_message_boards/viewtopic.php?t=6270)
Legend of Zelda - Voyager of Time (playable but unfinishable)
Release thread:
http://forums.zeldaspeedruns.com/index.php?topic=1266.0
Trailer:
Banjo Kazooie:
Snow Glow Village and Blue Moon Forest are the only ones I know of that are finished.
http://rarewarecentral.com/forums/showthread.php?t=6958
http://www.rarewarecentral.com/forums/showthread.php?t=7480
F Zero X: Climax edition
http://fzerocentral.org/viewtopic.php?t=13715
http://www.emulation64.fr/?page=download&id=256
I'm sure there are PLENTY more roms that work.
I also know that you can HEXEDIT to cheat your roms, or patch them for DEBLUR and they WORK on real hardware.
http://krikzz.com/forum/index.php?topic=3892.0