The JUCE cross-platform C++ framework.
C++ C Objective-C++ Objective-C Java Makefile
Latest commit 680d758 Sep 16, 2016 @hogliux hogliux JUCE version 4.2.4

README.txt

# The JUCE Library

JUCE (Jules' Utility Class Extensions) is an all-encompassing 
C++ framework for developing cross-platform software.

It contains pretty much everything you're likely to need to create
most applications, and is particularly well-suited for building 
highly-customised GUIs, and for handling graphics and sound.

Most JUCE modules are shared under the GNU Public Licence 
(GPLv2, v3, and the AGPLv3). This means that the code can 
be freely copied and distributed, and costs nothing to use 
in other GPL applications. One module (the juce_core module) 
is permissively licensed under the ISC.

For more information, visit the website:
http://www.juce.com