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
Rubina's Blue Sky Happiness	Joe Satriani			5:55	The Extremist	1992	E Standard	mute	1970-01-01
Rudolph the Red Nosed Reindeer	August Burns Red			2:07	August Burns Red Presents: Sleddin' Hill	2012	Drop D	mute	1970-01-01
Rudolph, The Red-Nosed Reindeer	Gene Autry and the Pinafores			3:07	Rudolph, The Red-Nosed Reindeer (Single)	1949	E Standard	mute	1970-01-01
Ruhe	Der Weg einer Freiheit			5:40	Der Weg einer Freiheit	2009	Eb Standard	mute	1970-01-01
Ruina Imperii	Sabaton			3:29	Carolus Rex	2012	Custom Tuning	mute	1970-01-01
Ruina Imperii	Sabaton			3:25	Carolus Rex	2012	E Standard	mute	1970-01-01
Rum Rage	Sticky Fingers			4:15	Land Of Pleasure	2014	E Standard	mute	1970-01-01
Rumbling HWY... Mission Street	Sonic Adventure 2			2:48	Sonic Adventure 2	2001	E Standard	mute	1970-01-01
Rumors Of My Demise Have Been Greatly Exaggerated	Rise Against			4:17	Siren Song Of The Counter Culture	2004	Eb Standard	mute	1970-01-01
Run	Disturbed			3:14	The Lost Children	2011	D Drop C	mute	1970-01-01
Run	Foo Fighters			5:26	Concrete and Gold	2017	E Standard	mute	1970-01-01
Run & Fight Gin!	Goro Ohmi			1:19	Ginga Nagareboshi Gin Ongakushuu	1986	E Standard	mute	1970-01-01
Run If You Can	Accept			4:49	Breaker	1981	E Standard	mute	1970-01-01
Run Through The Night	Accept			3:23	Predator	1996	Eb Standard	mute	1970-01-01
Run Through the Speed Highway (Speed Highway 1)	Sonic Adventure			1:57	Sonic Adventure Soundtrack	1998	E Standard	mute	1970-01-01