meSpeak.js : meSpeak.js (modulary enhanced speak.js) is a 100% client-side JavaScript text-to-speech library
jsmad : Javascript MPEG-1 Audio Layer III (mp3) and ID3v2 decoder
jsfx : This is a javascript library (with frontend) for sound effect generation.
Monaco Editor : The Monaco Editor is the code editor that powers VS Code.
Rich IntelliSense and Validation for TypeScript, JavaScript, CSS, LESS.
Basic Syntax Coloriz...
Online javascript beautifier : Beautify, unpack or deobfuscate JavaScript and HTML, make JSON/JSONP readable, etc.