First of all, if you've somehow never made your way to OCRemix, head on over right now and lose hours of your time. There's some truly fantastic work available there, all for free. Every flavor of musical interpretation you could ask for, from chiptune to big band to slow jazz to heavy metal.
Right now, though, I want to call your attention to "25 Year Legend", the album they've just released in honor of the 25th Anniversary of The Legend of Zelda.
I've loved the Zelda series for about 20 of those 25 years, and the overworld music from Link to the Past has a permanent spot in my heart as the most iconic videogame song ever written. It's just a magnificent piece of music.
"25 Year Legend" includes new takes on songs from Link to the Past, Link's Adventure, Ocarina of Time, Link's Awakening, Wind Waker, Majora's Mask, and the newest game Skyward Sword, written by a very diverse group of composers. Not every song on it is an out-of-the-park hit, but it's a delightful variety, an obvious labor of love, and free. If you have any affection for videogame music, please, go check it out.