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
Rainbow Dash's Theme	Mando Pony			2:25	The Ultimate MandoPony Collection	2012	E Standard	mute	1970-01-01
Rainbow Demon	Uriah Heep			4:30	Demons and Wizards	1972	E Standard	mute	1970-01-01
Rainbow Factory	Wooden Toaster			3:30	Rainbow Factory	2012	Drop D	mute	1970-01-01
Rainbow JakkaJan	Guilhox	Bass2		1:55	Memes	2010	E Standard	mute	1970-01-01
Rainbow Road	Nintendo			2:35	Mario Kart 8	2014	E Standard	mute	1970-01-01
Rainbow Thrash (Album Ver.)	PrinceWhateverer			3:26	N/A	2013	D Drop C	mute	1970-01-01
Rainbow Thrash (Revised)	PrinceWhateverer			3:30	N/A	2011	D Drop C	mute	1970-01-01
Rainbow Tylenol	Kitsune2			1:57	Square Dance	2009	Eb Standard	mute	1970-01-01
Rainbow Veins	Bullet For My Valentine	Bass2		5:03	Bullet For My Valentine	2021	Custom Tuning	mute	1970-01-01
Rainbow Warrior	Tyr			5:32	Eric the Red	2003	Custom Tuning	mute	1970-01-01
Raincoat Song	The Decemberists			2:27	Always The Bridesmaid: Vol 3	2008	E Standard	mute	1970-01-01
Raindrops Keep Fallin' on My Head	B. J. Thomas/Ana Carolina Giollo			1:42	Raindrops Keep Fallin' on My Head	2009	E Standard	mute	1970-01-01
Raindrops Keep Falling On My Head	B.J. Thomas			3:05	Raindrops Keep Falling On My Head	1969	E Standard	mute	1970-01-01
Raindrops and Puddles	Four Leaf Studios			2:40	Katawa Shoujo Enigmatic Box of Sound	2012	E Standard	mute	1970-01-01
Rainfall	LANDMVRKS			3:17	Lost in the Waves	2021	C# Drop B	mute	1970-01-01