Music Player (open-source)

• Amarok – https://amarok.kde.org/
• Audacious – https://audacious-media-player.org/
• Clementine – https://www.clementine-player.org/
• Musique – https://flavio.tordini.org/musique
• Musikcube – https://github.com/clangen/musikcube
• SMPlayer – https://www.smplayer.info/

Music Server (open-source)

• Airsonic (Java) – https://airsonic.github.io/
• Ampache (PHP) – https://ampache.org/
• Navidrome (Go) – https://www.navidrome.org/

DAW (open-source)

• Ardour – https://ardour.org/
• Audacity – https://www.audacityteam.org/
• LMMS – https://lmms.io/
• Zrythm – https://www.zrythm.org/

Audio Codecs

• AAC
• ALAC (Apple Lossless Audio Codec)
• FLAC – https://github.com/xiph/flac
• MP3
• Opus
• Vorbis

Audio Containers

• FLAC
• Ogg
• MP3
• MP4 (.m4a)
• WAV (.wav)