XUiDesigner parses an LV2 plugin's ttl file and generates the needed controller widgets. The created GUI can be saved as UI-Bundle, which then could be built and installed. For later editing of the UI, a JSON file is added, which you could load per drag 'n drop into XUiDesigner.

Fluida is an audio plugin in the LV2 format that acts as a frontend for fluidsynth.

Helm is a cross-platform polyphonic synthesizer available standalone and as an LV2 plugin.

This package provides the LV2 plugin "GxSuperFuzz", an analog simulation of the UniVox SuperFuzz pedal. In this simulation the trim pot, which is usually in the housing, is exposed as a control parameter. It adjusts the amount of harmonics.

Mamba is a virtual MIDI keyboard and MIDI file player/recorder for the JACK Audio Connection Kit. It comes with predefined keymaps for QWERTZ, QWERTY and AZERTY keyboards and also allows custom ones.

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.

Music player with support for most common audio formats, and plugins for various additional features such as visualization, effects and online service integration. In addition to a Qt-based interface it supports Winamp/XMMS skins.

This package provides the Rakarrack effects as LV2 plugins. The ports are done such that hopefully when Rakarrack gets an active maintainer these will get merged into the original project.

Rosegarden is a music composition and editing environment based around a MIDI sequencer that features a rich understanding of music notation and includes basic support for digital audio.

Zam plugins is a collection of audio processing plugins in the LADSPA, LV2 and VST2 formats, as well as standalone JACK versions. The collection includes ZaMaximX2, ZamAutoSat, ZamComp, ZamCompX2, ZamEQ2, ZamGEQ31, ZamHeadX2, ZamPhono, ZamGate, ZamGateX2, ZamTube, ZamDelay, ZamDynamicEQ, ZaMultiComp, ZaMultiCompX2 and ZamSynth.

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.

ZPlugins is a collection of audio DSP plugins intended to be bundled with the Zrythm digital audio workstation (DAW).

Music21 is a set of tools for helping scholars and other active listeners answer questions about music quickly and simply.

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.

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

Sfizz provides an SFZ parser and synth C++ library. It includes LV2 plugins and a JACK standalone client.

Mixxx is a DJ software. It integrates the tools DJs need to perform creative live mixes with digital music files.

Wolf Shaper is a waveshaper plugin with a graph editor. It is provided as an LV2 plugin and as a standalone Jack application.

GNU cursynth is a polyphonic synthesizer that runs graphically in the terminal. It is built on a full-featured subtractive synthesis engine. Notes and parameter changes may be entered via MIDI or the computer's keyboard.

QMidiArp is an advanced MIDI arpeggiator, programmable step sequencer and LFO. It can hold any number of arpeggiator, sequencer, or LFO modules running in parallel.

DSSI is a plugin API for software instruments with user interfaces, permitting them to be hosted in-process by audio applications. It is intended to be simple, GUI-toolkit-agnostic, and slightly biased towards familiarity with MIDI. The DSSI distribution package contains a JACK/ALSA-sequencer reference host and some plugins as well as the specification and header.

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

MusicBrainz Picard is a music tagging application, supporting multiple formats, looking up tracks through metadata and audio fingerprints.

Abjad helps composers build up complex pieces of music notation in iterative and incremental ways. Use Abjad to create a symbolic representation of all the notes, rests, chords, tuplets, beams and slurs in any score. Because Abjad extends the Python programming language, you can use Abjad to make systematic changes to music as you work. Because Abjad wraps the LilyPond music notation package, you can use Abjad to control the typographic detail of symbols on the page.