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
Fortress Around Your Heart	Sting			4:48	Dream Of The Blue Turtles	1985	E Standard	mute	1970-01-01
Haunted Fortress	Mike Morasky			1:30	Team Fortress 2	2010	E Standard	mute	1970-01-01
KABANERI OF THE IRON FORTRESS	EGOIST			4:57	Koutetsujou no Kabaneri OP Single - KABANERI OF THE IRON FORTRESS	2016	E Standard	mute	1970-01-01
Kagami no Naka no Actress	Meiko Nakahara			3:41	Kimagure Orange Road Opening 3	1989	E Standard	mute	1970-01-01
Marine Fortress	Vangough			3:44	Game On!	2010	D Standard	mute	1970-01-01
Mistress	Disturbed			3:49	Believe	2002	Eb Drop Db	mute	1970-01-01
Mistress For Christmas	Halestorm			3:37	Mistress For Christmas	2016	E Standard	mute	1970-01-01
Mistress Of Pain	Death Angel			4:07	The Ultra-Violence	1987	E Standard	mute	1970-01-01
Mistress Of The Bleeding Sorrow	Dissection			4:44	The Somberlain	1993	E Standard	mute	1970-01-01
Mistress for Christmas	AC/DC	Combo		4:03	Razors Edge - 1990	1990	E Standard	mute	1970-01-01
Mistress of the Salmon Salt (Quicklime Girl)	Blue Öyster Cult			5:13	Tyranny And Mutation	1973	E Standard	mute	1970-01-01
Our Fortress Is Burning II - Bloodbirds	Agalloch			6:24	Ashes Against the Grain	2006	D Standard	mute	1970-01-01
Our Fortress Is Burning...I	Agalloch			5:25	Ashes Against the Grain	2006	D Standard	mute	1970-01-01
Pale Enchantress	Tristania			6:34	Widow's Weeds	1998	E Standard	mute	1970-01-01
Questlords of Inverness, Ride to the Galactic Fortress!	Gloryhammer			5:25	Space 1992: Rise of the Chaos Wizards	2015	D Standard	mute	1970-01-01