Glyr comes both in a command-line interface tool (glyrc) and as a C library (libglyr).

The sort of metadata glyr is searching (and downloading) is usually the data you see in your musicplayer. And indeed, originally it was written to serve as internally library for a musicplayer, but has been extended to work as a standalone program which is able to download cover art, lyrics, photos, biographies, reviews and more.

InstantMusic downloads a song from YouTube in MP3 format. Songs can be searched by artist, name or even by a part of the song text.

This application displays an icon in the system tray (also known as notification area) of your desktop, which shows the status of the JACK audio server and when you click on it, a menu pops up, which lets you quickly select from the JACK configuration presets you created with QjackCtl. When you select a preset, its JACK engine and driver configuration settings are loaded via DBus into JACK and then the server is restarted. This allows you to switch between different audio setups with just two mouse clicks.

Spectacle is a real-time spectral analyzer using the short-time Fourier transform, available as LV2 audio plugin and JACK client.

libdiscid is a C library for creating MusicBrainz and freedb disc IDs from audio CDs. It reads a CD's table of contents (TOC) and generates an identifier which can be used to lookup the CD at MusicBrainz. Additionally, it provides a submission URL for adding the disc ID to the database and gathers ISRCs and the MCN (=UPC/EAN) from disc.

Hydrogen is an advanced drum machine for GNU/Linux. Its main goal is to enable professional yet simple and intuitive pattern-based drum programming.

Bristol is an emulation package for a number of different classic synthesizers including additive and subtractive and a few organs. The application consists of the engine, which is called bristol, and its own GUI library called brighton that represents all the emulations. There are currently more than twenty different emulations; each does sound different although the author maintains that the quality and accuracy of each emulation is subjective.

Petri-Foo is a fork of the Specimen sampler project intended to run under a JACK session.

Sorcer is a wavetable LV2 plugin synthesizer, targeted at the electronic or dubstep genre.

Wolf Spectrum is a real-time 2D spectrogram plugin. It is provided as an LV2 plugin and as a standalone Jack application.

GNU Denemo is a music notation editor that provides a convenient interface to the powerful music engraving program Lilypond. Music can be typed in using the computer keyboard, played in using a MIDI keyboard, or even input via a microphone connected to the sound card. The final product is publication-quality music notation that is continuously generated in the background while you work.

pysmf is a Python extension module for reading and writing Standard MIDI files, based on libsmf.

Aria Maestosa is a MIDI sequencer and editor. It lets you compose, edit and play MIDI files with a few clicks in a user-friendly interface offering score, keyboard, guitar, drum and controller views.

This plugin for beets automatically obtains tag data from https://bandcamp.com/. It's also capable of getting song lyrics and album art using the beets FetchArt plugin.

New Session Manager (NSM) is a tool to assist music production by grouping standalone programs into sessions. It can be used create a session, or project, and add programs to it and then use commands to save, start/stop, hide/show all programs at once, or individually. The session can be interrupted and easily resumed at a later time.

LSP (Linux Studio Plugins) is a collection of audio plugins available as LADSPA/LV2 plugins and as standalone JACK applications.

This package provides the LV2 plugin "GxSaturator", a saturation effect.

Clyrics is an extensible command-line tool to fetch the lyrics of songs. It can be used in daemon mode along with the Music-on-Console (MOC) and cmus console music players.

The Non Timeline is a powerful, reliable and fast modular digital audio timeline arranger. It utilizes JACK for inter-application audio I/O and the NTK GUI toolkit for a fast and lightweight user interface. Non Timeline can be used alone or in concert with Non Mixer and Non Sequencer to form a complete studio.

Cmus is a small and fast console music player. It supports many input formats and provides a customisable Vi-style user interface.

Regrader is a delay effect where the repeats degrade in resolution. This is an unofficial port of the Regrader plugin created by Igorski. It is available as an LV2 plugin and a standalone JACK application.

abjad-ext-nauert provides classes for dealing with composer and music theorist Paul Nauert's quantization grids or Q-Grids, for short.

Pragha is a lightweight music player based on Gtk and sqlite. It is constructed to be fast, light, and simultaneously tries to be complete without obstructing your daily work.

Fabla is an LV2 drum sampler plugin instrument. It is ideal for loading up your favorite sampled sounds and bashing away on a MIDI controller.