JUCE is an open-source cross-platform C++ application framework for desktop and mobile applications, including VST, VST3, AU, AUv3, RTAS and AAX audio plug-ins.

AudioKit Synth One: Open-Source iOS Synthesizer App

Enhanced version of Cockos' iPlug - A simple-to-use C++ framework for developing cross platform audio plugins and targeting multiple plugin APIs with the same code. VST / VST3 / Audiounit / RTAS / AAX (Native) formats supported. NOTE: THIS IS OBSOLETE, PLEASE SEE IPLUG2:

A curated list of my favourite music DSP and audio programming resources

C++ Audio Plug-in Framework for desktop, mobile and web [PRE-RELEASE]

A user interface toolkit mainly for audio plug-ins

DSP servers using general purpose networks and computers

Element Audio Plugin Host

Various resources related to developing plugins for audio production.

pMix - a preset interpolator, plug-in chainer and Faust IDE written with JUCE

A collection of templates for creating Audio Unit V3 in Xcode

A basic and experimental guitar modeling amp

A Better(Maybe) iOS Audio Stream、Cache、Play Framework

VST delay plugin where the repeats degrade in resolution

Collection of tutorials & resources for the C++ library JUCE

VST3 version of system-supplied Mac OS X AUNetSend audio plugin.

A VST / VST3 / AU / LV2 Reverb Plugin

VST/AU clock and reset generator

An AUv3 MIDI plugin. See the blog post

EP-MK1 is a real-time physical model plugin of an Electric Piano built with Pure Data and Camomile.

Audio plugin that lets you use MIDI to pitch-shift via delay to turn unpitched audio into melodies

An AudioUnit-based music programming environment for macOS

Simple iOS synthesizer that uses sound fonts for sound generation - https://bradhowes.github.io/SoundFonts/index.html

VST plugin that acts as a multi channel formant filter

Symbiosis is a developer tool for adapting Mac OS X VST plug-ins to the Audio Unit (AU) standard.

A real-time euclidean rhythm generator VST made with Pure Data and Camomile.

A metronome made with AUAudioUnit

A barebones Gain plugin, created while learning the basics of Audio Unit programming.

A pair of virtual Instruments based on the Roland System 100, Oberheim Xpander and Korg Volca Keys construction kits.