eLook: Cheats and tips.
GameFAQs: Legend of Zelda DX: Codes, walkthroughs, and user reviews.
GameFAQs: Legend of Zelda: Link's Awakening: Walkthroughs and user reviews.
GameSpot: Legend of Zelda: DX: Game features and review [8.7/10].
IGN: Legend of Zelda: Link's Awakening DX: Game information, news, codes, and review [10/10].
RPGamer: The Legend of Zelda: Link's Awakening: Game information, media, and walkthroughs.
The Wind Fish's Egg: A great site on Link's Awakening covering nearly every detail of both the original and DX versions of the game.
Zelda 4 Glitches: This site is dedicated wholly to the glitches in Link's Awakening. Tricks, weird stuff, and secret worlds.