SuperEmbed.js detects YouTube, Vimeo, Vine, VideoPress, DailyMotion, and more embedded videos on webpages and makes them responsive. Essentially, this means they strech to fill their container while still maintaining the original aspect ratio.
Plyr is a simple, accessible and customizable HTML5, YouTube and Vimeo media player.
Youtube Gallery Wall transforms a UL element containing links to Youtube videos into a "wall" of video thumbnails automatically. Moving your mouse over each thumbnail (or tapping on a mobile devices) gives you the option to play the video inside a lightbox.
Tone.js is a Web Audio framework for creating interactive music in the browser. The architecture of Tone.js aims to be familiar to both musicians and audio programmers looking to create web-based audio applications.
A nice looking audio player that you can use on your website, created by using HML5 Audio, jQuery and CSS.
howler.js is an audio library for the modern web. It defaults to Web Audio API and falls back to HTML5 Audio.
canvid is a tiny dependency free library for playback of relatively short videos on canvas elements.
Microm goal it's to make trivial to play and convert audio in the browser.
jQuery Video Extend is a plugin to extend HTML5 videos as:
AudioControls is a simple lightweight jQuery plugin, helps you to create your own audio player, playlist and additional features.
PreViewTube.js is a jQuery plugin for animating YouTube thumbnail images.