loglevel : Minimal lightweight logging for JavaScript, adding reliable log level methods to wrap any available console.log methods
Wave.js : Audio visualizer library for javascript. Create dynamic animations that react to an audio file or audio stream.
darken : Easy control over your dark mode in a web environment
polyfill : polyfill makes web development less frustrating by selectively polyfilling just what the browser needs. Use it on your own site, or as a service.
A project which offers the same Todo application implemented using MV concepts in most of the popular JavaScript MV frameworks of today.