JavaScript Code Style checker : jscs is a code style checker. jscs can check cases, which are not implemented in jshint, but it does not duplicate jshint functionality, so you should...
jsmad : Javascript MPEG-1 Audio Layer III (mp3) and ID3v2 decoder
howler.js : howler.js is an audio library for the modern web. It defaults to Web Audio API and falls back to HTML5 Audio.
JSHint : This is JSHint, a tool that helps to detect errors and potential problems in your JavaScript code.
jsmad : jsmad is a pure javascript MP3 decoder, based on libmad, with an ID3 decoder written from scratch.