librosa : librosa is a python package for music and audio analysis. It provides the building blocks necessary to create music information retrieval systems.
regex101 : Free PCRE-based regular expression debugger with real time explanation, error detection and highlighting.
SonoBus : SonoBus is an easy to use application for streaming high-quality, low-latency peer-to-peer audio between devices over the internet or a local network....
CDP WASM Suite : A unique sound transformation toolkit, compiled to run anywhere.
The Composer's Desktop Project — hundreds of esoteric spectral, granular and waveset ...
Paul's Extreme Sound Stretch : This is a program for stretching the audio. It is suitable only for extreme sound stretching of the audio (like 50x) and for applying special effects ...
VST Plugins Free - Virtual instruments and effects