Tracking and Discovering

• Database #1: RYM
• Database #2: Discogs
• Database #3: MusicBrainz
• Database #4: AllMusic
• Encyclopedia of Electronic Music
• UbuWeb Sounds

Discovery Tools

• Last.fm
• Gnoosic
• Music-Map
• Every Noise at Once
• Forgotify
• Mixshake
• Bandcamp Discovery Tool
• AllMusic Discovery Tool
• List of youtube channels that upload music

Obtaining Music

Legal Way

• Discogs Marketplace
• eBay
• Amazon
• Amazon Japan
• Bandcamp
• Free Music Archive
• Internet Archive
• Lumpysoft
• Subreddit about Open Directories
• Open Directory: Replicaradio

Not so legal way

• List of music blogs that upload music
• Soulseek
• SMLoadr
• Rutracker
• Snahp.it
• Vse Tut Online
• Uploadedtrend

Tagging Music

• MusicBrainz Picard
• beets
• MP3Tag
• TagScanner

Music Players

• Tauon Music Box
• MediaMonkey
• Foobar2000
• Winamp
• JRiver Media Center
• Winyl
• Daphile
• Roon
• Dopamine

Music Lockers and Cloud Storing

• iBroadcast
• Mymusi.cc
• MEGA
• Google Drive
• Yandex

Streaming

• Spotify
• Deezer
• TIDAL
• Earbits
• RollingTune

Hardware and Audio Quality

• Spek: Spectrum Analyzer
• Test your speakers balance

Misc.

• List of every genre according to RYM
• Last.fm Mainstream Calculator
• Make charts #1: Topsters
• Manual Scrobbler for Last.fm #1
• Manual Scrobbler for Last.fm #2
• Manual Scrobbler for Last.fm #3
• Interesting article about tagging Artist names
• JDownloader 2