Free Music Instrument Tuner (FMIT)

Audio
Giada - Your Hardcore Loop Machine
Giada is an open source, minimalistic and hardcore music production tool. Designed for DJs, live performers and electronic musicians.
Melody
Open Source Music Player and Manager based on Gtk+ and Vala
Mellow Player
MellowPlayer is a free, open source and cross-platform desktop application for listening to your favorite streaming music sites.
Meridius
MPDevil: music browser for MPD · GitHub
A simple music browser for MPD. Contribute to SoongNoonien/mpdevil development by creating an account on GitHub.
Zrythm DAW
A highly automated and intuitive digital audio workstation.
Carla - KXStudio
Cider
Cider - A open source Apple Music client designed from the ground up for speed and efficiency.
Flacon - Audio File Encoder
Headset app
Desktop music player built on YouTube and Reddit
YouTube Music Desktop App
Free cross platform Desktop Player for YouTube Music
Learn Electronic Music Production
Learn Ableton for Free. Curated tutorials, right on your favorite DAW.
SoX - Sound eXchange
Music - GNOME
VVAVE Music Player
Exaile · Music Player for GTK+
Qt-based Multimedia Player
beets: music media organizer
Nuclear Music Player
Homepage of the Nuclear music player
Librosa
Librosa : audio and music processing in Python
ToneMatrix Redux Sequencer
A pentatonic step sequencer. Click tiles and make music.
ArtBeats
A simple sequencer where you can create visual patterns and listen to them, with the ability to change the instrumentation, tempo, swing, and more.
gPodder
Poddr - Podcasts for desktop
Poddr is a free podcast player for Windows, Mac and Linux.
Amarok KDE
Tauon Music Box
Download available through Flatpak, Snap or the Arch User Repository.
Quodlibet · GitHub
Music player and music library manager for Linux, Windows, and macOS - GitHub - quodlibet/quodlibet: Music player and music library manager for Linux, Windows, and macOS
Sayonara Player
Linux audio player and music library manager
vitunes