I'm a huge metroid fan and so are a lot of other people, thankfully talented people too, here are some fan made goodies
first up are Remixs and a covers
Harmony of a Hunter
http://www.youtube.com/watch?feature=player_embedded&v=kBrI7pzU_Hg#!
http://www.shinesparkers.net/harmonyofahunter/
great album, a lot of different styles
Reserve tank
http://www.youtube.com/watch?v=Mn-YqUQTwWE
http://shariqansari.com/reservetank/music/cover.jpg
http://reservetank.darkesword.com/index.html
another great remix album
and for all the metal heads out there
Metroid metal: varia suite
http://metroidmetal.bandcamp.com/album/varia-suite
it used to be free but you can still listen to all the songs for free though
this is a tech demo for a fan made metroid II remake, although a demo its a full game metroid confrontation, you might want to adjust the controls or use a game pad
http://www.youtube.com/watch?v=WRfrPVNRaEQ
http://metroid2remake.blogspot.com/
it will be called
Tech Demo Download:
(Metroid: Confrontation v2.5)
to right
I've found it to be very fun, the remake however is still a work in progress and no releases for it have been made
if you even need to know anything about metroid this is the number 1 place to go, they've even had interviews with the people who made the games
http://www.metroid-database.com/
I'd check out the apps section they have some cool stuff in there