FoxDot : FoxDot is an easy-to-use Python library that creates an interactive programming environment and talks to the powerful sound synthesis engine, called S...
Essentia : Open-source library and tools for audio and music analysis, description and synthesis
readability-lxml : In few words, Given a html document, it pulls out the main body text and cleans it up. It also can clean up title based on latest readability.js code.
jsmad : jsmad is a pure javascript MP3 decoder, based on libmad, with an ID3 decoder written from scratch.
meSpeak.js : meSpeak.js (modulary enhanced speak.js) is a 100% client-side JavaScript text-to-speech library
pyo is a Python module written in C to help digital signal processing script creation.