There's loads of cool NES homebrews and prototypes out there. We've just added the following:

Happily Ever After: Unreleased prototype
Bio Force Ape:  Unreleased prototype - this one had a lot of potential! Very cool game.
Battle Kid: Awesome homebrew platformer
Battle Kid 2:  The sequel to Battle Kid
Jet Paco: Homebrew from the Mojon Bros
Yun: Homebrew from the Mojon Bros
Sir Ababol: Homebrew from the Mojon Bros
ShadowHawk:  Unreleased SNES game (project couldn't find publisher in 1992)