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.

Quod Libet provides several ways to browse and view your local music library, along with flexible search capabilities. It includes a tag editor, which can also be invoked as a standalone program, and further supports streaming audio and feeds (such as podcasts).

B.Jumblr is a pattern-controlled audio stream / sample re-sequencer LV2 plugin.

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

GNU LilyPond is a music typesetter, which produces high-quality sheet music. Music is input in a text file containing control sequences which are interpreted by LilyPond to produce the final document. It is extendable with Guile.

AVLdrums is a drum sample player LV2 plugin dedicated to Glen MacArthur's AVLdrums. This plugin provides a convenient way to sequence and mix MIDI drums and comes as two separate drumkits: Black Pearl and Red Zeppelin.

QMidiRoute is a MIDI event router and filter. MIDI note, control change, program change and pitch bend events are logged, and can be filtered, redirected and transformed into other events according to MIDI maps defined as tabs in the main control surface.

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

This is the C implementation of the ORCΛ language and terminal livecoding environment. It's designed to be power efficient. It can handle large files, even if your terminal is small.

Orca is not a synthesizer, but a flexible livecoding environment capable of sending MIDI, OSC, and UDP to your audio/visual interfaces like Ableton, Renoise, VCV Rack, or SuperCollider.

LibSMF is a C library for handling SMF ("*.mid") files. It transparently handles conversions between time and pulses, tempo map handling and more. Full API documentation and examples are included.

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.

PortMidi is a library supporting real-time input and output of MIDI data using a system-independent interface.

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.

Le Biniou is a music visualization & VJing tool. It creates live visuals based on audio performances or existing tracks.

Drumstick is a set of MIDI libraries using C++/Qt5 idioms and style. It includes a C++ wrapper around the ALSA library sequencer interface. A complementary library provides classes for processing SMF (Standard MIDI files: .MID/.KAR), Cakewalk (.WRK), and Overture (.OVE) file formats. A multiplatform realtime MIDI I/O library is also provided with various output backends, including ALSA, OSS, Network and FluidSynth.

x42-plugins is a collection of over 80 cross-platform LV2 audio and MIDI plugins that can also run as standalone JACK applications.

This project is a real time General MIDI synthesizer based on the Sonivox EAS Synthesizer by Google. It does not need external soundfonts, using embedded samples instead.

Midicsv reads a standard MIDI file and decodes it into a comma-separated value file (CSV), which preserves all the information in the MIDI file. The ASCII CSV file may be loaded into a spreadsheet or database application, or processed by a program to transform the MIDI data (for example, to key transpose a composition or extract a track from a multi-track sequence). A CSV file in the format created by midicsv may be converted back into a standard MIDI file with the csvmidi program.

Shiru plugins is a collection of audio plugins created by Shiru, ported to LV2 by the Linux MAO project using the DISTRHO plugin framework.

The Non Session Manager is an API and an implementation for audio session management. NSM clients use a well-specified OSC protocol to communicate with the session management daemon.

This package provides a Gtk4 GUI for the ALSA controls presented by the Linux kernel Focusrite Scarlett2 USB Protocol Mixer Driver.

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

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

The jalv.select package provides a graphical user interface allowing users to select LV2 plugins and run them with jalv.