ShredDB is an experimental .shred library, I removed the audio so it's pretty useless. You can find the source .psarc files here.

Song	Artist	Play	Shred	Length	Album	Year	Tuning	Uploader	Updated	Delete
Merestä Maalle	Stam1na			4:04	Uudet Kymmenen Käskyä	2006	Custom Tuning	mute	1970-01-01
Merry Go Round	YUI			4:01	From Me To You	2006	E Standard	mute	1970-01-01
Messiah	Aria			4:40	Armageddon	2006	Eb Standard	mute	1970-01-01
Metal Black	Venom			3:14	Metal Black	2006	C# Standard	mute	1970-01-01
Metal By Numbers	Brian Posehn			5:45	Live In: Nerd Rage	2006	C# Standard	mute	1970-01-01
Metal Crüe	Sabaton			3:50	Attero Dominatus	2006	E Standard	mute	1970-01-01
Metroid (Kraid's Lair)	The Advantage			2:49	Elf-Titled	2006	E Standard	mute	1970-01-01
Mi Gente	Ozomatli ft A B Quintanilla Kumbia Kings			4:24	Street Signs	2006	E Standard	mute	1970-01-01
Midna's Lament	Koji Kondo			2:19	The Legend of Zelda Twilight Princess	2006	E Standard	mute	1970-01-01
Midsummer Night	Korpiklaani			3:29	Tales Along This Road	2006	E Standard	mute	1970-01-01
Mighty To Save	Hillsong United			6:56	Mighty To Save	2006	E Standard	mute	1970-01-01
Mii Channel Theme	Nintendo			1:56	Wii Music	2006	E Standard	mute	1970-01-01
Mii Channel Theme But The Number Of Doots Keeps Increasing	Nintendo			2:24	Wii Music	2006	E Standard	mute	1970-01-01
Million Dollar Man	Kutless			2:58	Hearts of the Innocent	2006	Drop D	mute	1970-01-01
Million Miles	House of Lords			5:04	World Upside Down	2006	Drop D	mute	1970-01-01