JUCE

JUCE is a cross-platform C++ toolkit for building audio applications and plug-ins, widely used in the music and audio software industry. It originated with Julian Storer at Raw Material Software and is named Jules' Utility Class Extensions.

The framework provides a comprehensive set of modules for audio processing, user interfaces, and plugin development. It supports audio I/O, DSP, MIDI, threading, and file I/O, and includes ready-to-use GUI components, OpenGL support, and a suite of graphics tools.

A key feature is its plugin support; JUCE can build audio processors that target major plugin formats such as VST2/3, AudioUnit, and AAX, and it also includes a simple host. The Projucer, JUCE's project management tool, generates platform-specific projects and can act as a basic IDE.

Platform coverage includes Windows, macOS, Linux, iOS, and Android, enabling developers to write once and deploy to multiple ecosystems. The framework is modular and shares a clear separation between audio processing and user interface, with a stable C++ API designed to facilitate cross-platform development.

JUCE is distributed under a dual license model, available under GPL v3 for open-source projects and under a commercial license for proprietary development. It has a large and active community of developers and studios that contribute to its ongoing development.