• Nicotine Plus - Soulseek client. Kind of torrent client where people host music mostly.
• FMYH - Reddit Wiki for Free Media Heck Yeah
• Monochrome - Looks like a commercial streaming site, but can download songs and playlists as high res flacs
• Tidal-dl - ListenBrainz collects listens from all services
• Arcod - For individual files from Tidal etc
• Rentry Firehawk52 - a collection of resources
• DoubleDoubleTop - Flac downloads, can be down sometimes
• Squid WTF - For 320kbps from Jio saavn as of now
• Lucidac - For flacs, didn't work as of now
• Bandcamp dowloads - Not flac, but from bandcamp
  
• SpotiFLAC - A executable for downloading flacs. But free version has downtimes.
• Musicbrainz Picard - For organizing the music files and adding metadata. Be careful, writes are permanant.
• Foobar2000 - For adding replay gain to music