DouglasBarr's Stars
juce-framework/JUCE
JUCE is an open-source cross-platform C++ application framework for desktop and mobile applications, including VST, VST3, AU, AUv3, LV2 and AAX audio plug-ins.
Tracktion/choc
A collection of header only classes, permissively licensed, to provide basic useful tasks with the bare-minimum of dependencies.