I realize this is kind of old, but I didn't see a topic for it.
What is it?Legend of Zelda Ura was originally going to be an expansion for the Nintendo 64's Legend of Zelda: Ocarina of Time. It would take advantage of the Nintendo 64 Disk Drive, and would provide all the content that was cut when porting Ocarina of Time to a cartridge when Nintendo scrapped the idea of releasing it for the Disk Drive. It would also include much improved graphics and make Ocarina of Time more challenging.
Now, a small group of people have taken to using the few clues we have as to what it would be and are remaking it so we can all experience what we never got to see from Nintendo.
Why Nintendo never released it:As it was all stuff in Beta Zelda, it seems like this would eventually come out, even if only as a leak. That never happened, as when the 64DD finally came out, Nintendo assured its immediate failure in the U.S. However, there was also some laziness in the developers, who decided to make Majora's Mask instead when they thought Ura Zelda would be too hard.
Screenshots (Nintendo's version):
Screenshots of the Ura Project

Where can I keep track of this?Right here.