Free MP3 Download - Deezer downloader.
YtmDL Web - Best looking and performing online YouTube music downloader.
RuTracker - Requires Sign-up.
SoftArchive - SoftArchive's Music Section, has many different Albums you might not find elsewhere.
Hikarinoakariost | Sukidesuost | Nyaa - Very good and reliable sources to get mainly Anisons from, but also other Asian Music as well. They use friendly file hosters except Nyaa, it uses torrents instead.
Unreleased Disco - Huge archive of Unreleased Hip-Hop/Pop Songs from various Artists (currently down). They also have a weekly folder found here. Their Reddit.
SoulseekQT - P2P Music Sharing Client, can have some niche and hard to find music.
Nicotine+ - A graphical client for Soulseek that is frequently updated unlike Soulseek.
Deemix & d-fi - Deezer downloaders. Deemix can convert Spotify playlists into Deezer playlists to download them while d-fi has Tidal support on top of that. They can download up to 128 kb/s quality with a free acount. To go higher, it requires a paid Deezer account.
Qobuz-DL - Qobuz downloader. Supports downloads of last.fm, Spotify and Apple music playlists through Qobuz. Requires a paid Qobuz account.
Tidal-Media-Downloader - Tidal downloader in CLI. A GUI version also exists. General guide for installation (guide for Tidal-gui is outdated). Requires a paid Tidal account.
streamrip - A Scriptable Music Downloader for Qobuz, Tidal, SoundCloud, and Deezer. Supports downloads of Spotify and Apple Music playlists through last.fm. Requires a paid Qobuz/Tidal/Deezer account.
OrpheusDL - Music downloading client.
OrpheusDL-Tidal - Tidal downloader plugin. Requires a paid Tidal account.
OrpheusDL-Qobuz - Qobuz downloader plugin. Requires a paid Qobuz account.
OrpheusDL-Deezer - Deezer downloader plugin. Requires a paid Deezer account.
OrpheusDL-SoundCloud - SoundCloud downloader plugin. Requires a paid SoundCloud account to download high quality.
OrpheusDL-Napster - Napster downloader plugin. Requires a paid Napster account.
OrpheusDL-Musixmatch - Musixmatch lyrics downloader plugin.
BlockTheSpot - A multi-purpose AdBlocker and skip-bypass for the Windows Spotify desktop application.
Slav Art - Have many bots that can losslessly download from Qobuz, Tidal, Deezer, Soundcloud and Spotify in full Quality using this bot. They also allow community requesting/sharing. Discord Server.
SquidBoard - A forum for sharing and requesting any type of music including Game OSTs, Anime OSTs, TV music and more. Requires Sign-up.
Doujin Café - The source of nearly all doujin rips online. Discord Server.
r/xTrill - Subreddit for requesting and sharing Music.
RipRequestsNew - The Discord Server of the now banned r/RipRequestsNew, the successor of r/RipRequests after it got closed down. They allow requesting and sharing music (currently not). Discord Server
Morris Motel - Have some guides relating to ripping from Deezer such as generating Hi-Fi ARLs etc. previously known as r/FreeDeezerARL.
Spek - Cross-platform GUI spectral creation program with easy drag and drop. Beginner-friendly but spectograms are not as detailed/clear as SoX.
SoX - Cross-platform CLI Swiss Army knife of sound processing programs, generates clean high quality spectograms with loads of additional features like collaging multiple spectograms and even applying various effects to these sound files. First time users may be confused by the vast features and are hence recommended to read the documentation once.
hey-bro-check-log - A CLI log checker maintained by Doujin Café Discord. Forked from the official hbcl repository.
CUETools - CUETools is a tool for lossless audio/CUE sheet format conversion. The goal is to make sure the album image is preserved accurately.
dzunlock - A browser userscript that allows Hi-Fi streaming on deezer.com.