(A WiP obviously. Gonna compile all the credits-y-ness from other pages, plus some links, here.)
The Zelda Wiki - The resource I used in compiling information on the races, places, and items of the Zelda games. If you're looking for some Hylian inspiration of your own, this is a good place to start.
Jaywalt's Guide to Making 16-Bit Maps - A blog post on how to make Zelda-based battlemaps. Useful whether you're making your own map or just using an already-made dungeon from a Zelda game.
Video Game Atlas - Maps of various video game places, including many Zelda ones. You can just grab a Zelda dungeon, straight up!
Spriter's Domain - Contains sprites for building your own maps from (almost-)scratch.
(Or, people who helped me!)
Chameleon-X for a lot of inspiration, and some entries' wordings (Megaton Hammer, for example)
Thunderforge8, for the idea for an Ocarina item.
Garner_adam, for Cane of Somaria lego-castle glitch.
RPJesus, for Magic Cape and Iron Boots ideas.
Fireclave, whose post on the Wizards boards is about 99% of the Building Link page.
Many others on the Wizards of the Coast message boards, for their encouragement, ideas, and critiques.