We all know that Zelda has amazing music. But it also has some pretty talented fans as well. If you have ever seen a great fan video, or ever find a new one, I encourage you to share it here.
This first one is so impressive and cool that I can't really describe it. He broke down the Wind Waker title theme, played each individual instrument, and then overlaid them.

Wind Waker Unplugged (FreddeGredde)
Here is the actual music for comparison (please only post fan made music, unless you are making a direct comparison like this). FreddeGredde's is obviously not exactly the same, but I think it sounds just as good.
Wind Waker Theme

This guy does an a capella medley with a violin.
Legend of Zelda medley - A Capella Voices and Violin

This is a cool video in its own right, but the fact that it's Zelda makes it even better.
Song of Healing on Wine Glasses

OK, just one last video from me. This is Sp0ntaneous, the same guy from the last one, with the Ballad of the Wind Fish from Link's Awakening.
Ballad of the Wind Fish on Kid Toys

One last thing: it doesn't have to be some random amateur guy. I saw a string concerto medley that was fantastic.

this is not my kinda stuff, but still kinda funny