Audio Editing & Production

Plugins 4 Free catalogs instrument and effect plugins for audio software, with categories for synthesizers, drums, samplers, and MIDI tools.

Igorski offers free audio plugins in VST and Audio Unit formats, plus Kontakt instruments that work with Kontakt or Kontakt Player.

Bespoke uses connected modules to create sounds in a modular synthesizer designed for musical exploration and jamming.

Aria Maestosa is an open-source (GPL) MIDI sequencer/editor for composing, editing and playing MIDI files on Mac OS X, Windows and Linux/Unix.

TuneBlades uses AI to resize, remix, and adjust music tracks for editors, agencies, and creators.

Helm offers a free polyphonic synthesizer for GNU/Linux, Mac, and Windows, as a standalone program or audio plugin.

Chowdhury DSP offers audio signal-processing tools for music makers, including a customizable digital effects pedal and effect chains.

Based on Pure Data, plugdata provides visual audio patching with desktop, mobile, and plugin formats listed for several platforms.

SoundGator provides downloadable sound effects with no registration requirement or attribution, according to its page.

Pianobook brings sound enthusiasts together around sample packs, with search, creator pages, and options to submit resources.

A free, open source reimplementation of Impulse Tracker, Schism Tracker creates music and uses a player based on the ModPlug engine.

Furnace supports a broad range of older 8-bit and 16-bit systems, sound chips, and arcade hardware as a chiptune music tracker.

Sequence browser-based drum beats with Drumhaus, an online machine with eight voices and 16 steps.

Hydrogen publishes releases and downloads for its drum-machine software, with update announcements on the project page.

Looperman lists free music software, including VST plugins, VSTi instruments, audio utilities, and digital audio workstations.

Record MIDI performances with live visualization and playback features in MIDI Recorder.

For live performances, Sound Show combines a soundboard and multimedia player with sound grids arranged across multiple tabs.

Vital provides wavetable synthesis with spectral oscillator warping to reshape waveforms and create different sounds.

The Audacity repository contains source code for its cross-platform audio editing and recording application.

WavePad is NCH's audio editor for desktop with waveform editing, effects and broad file support. The free edition is licensed for non-commercial home use; paid editions cover other uses.

rFXGen generates sound effects through a simple interface, with a downloadable tool and project links provided by its creator.

TONEX uses AI Machine Modeling to model the sound of guitar amps, cabinets, combos, and pedals as a plug-in for Mac and PC.

SuperCollider provides a free, open source platform for audio synthesis and algorithmic composition, with an audio engine, language, and editor.

SPARTA offers open-source plugins for spatial audio production and playback, including high-resolution Ambisonic tools.