Arcade ROMS
https://archive.org/download/MAME213RomsOnlyMerged

Console ROMS
https://archive.org/download/TOSEC_V2017-04-23/Atari/
https://archive.org/download/TOSEC_V2017-04-23/Nintendo/
https://archive.org/download/TOSEC_V2017-04-23/Sega/
https://archive.org/download/TOSEC_V2017-04-23/NEC/

NEC PC Engine CD
https://archive.org/download/redump.pce

Sega Mega Drive CD
https://archive.org/download/redump.mcd

Sega Saturn
https://archive.org/download/redump.ss

Sony PlayStation
https://archive.org/details/Sony-Playstation-JP-ASIA-Part-1
https://archive.org/details/Sony-Playstation-JP-ASIA-Part-2
https://archive.org/details/Sony-Playstation-EUR-Redump.org
https://archive.org/details/SonyPlaystation-EUR-Part2-Redump.org2019-06-05
https://archive.org/details/Sony-Playstation-USA-Redump.org-2019-05-27

Sega Dreamcast
https://archive.org/details/SegaDreamcast-Redump.org2019-05-28
https://archive.org/details/TosecDreamcastUsaGames2019Sep09AnniversaryRelease
https://archive.org/details/TosecDreamcastPalGames2019Sep09AnniversaryRelease
https://archive.org/details/TosecDreamcastJpGames2019Sep09AnniversaryRelease
https://archive.org/details/TosecDreamcastBonusGames2019Sep09AnniversaryRelease

Covers
http://www.thecoverproject.net
http://beet.the-eye.eu/DataHoarder/tmp_requests/ssdct/thecoverproject.net/site/

Music
nsf kss gbs hes smd spc ssf psf dsf gsf
XXX.joshw.info
https://vgmrips.net/packs/chips

Music Software
https://github.com/vgmrips/vgmplay
https://github.com/losnoco/vgmstream
Windows Only
https://www.foobar2000.org/components

Asset Extraction
https://hcs64.com/vgm_ripping.html
https://github.com/m35/jpsxdec
https://github.com/cebix/psximager
https://github.com/einsteinx2/gditools
https://github.com/Isaac-Lozano/afs_util
http://snesmusic.org/hoot/kingshriek/ssf/
https://www.zophar.net/utilities

https://linux.die.net/man/1/bchunk
https://www.mankier.com/1/cueconvert