h5Validate is an HTML5 form validation plugin for jQuery. It works on all major browsers, both new and old. Implements inline, realtime validation best practices.
Validatr is a jQuery plugin that relies on using modern HTML5 input attributes to perform validation.
flv.js works by transmuxing FLV file stream into ISO BMFF (Fragmented MP4) segments, followed by feeding mp4 segments into an HTML5
<video> element through Media Source Extensions API.
Fabric also has SVG-to-canvas (and canvas-to-SVG) parser.
Multirange is a tiny polyfill for HTML5 multi-handle sliders.
Plyr is a simple, accessible and customizable HTML5, YouTube and Vimeo media player.
A tutorial about creating social share buttons for your mobile website by using jQuery, HTML5 and CSS. It also support share via WhatsApp.
A tutorial about creating responsive iOS9 iMessage interface by using jQuery, CSS and Html5.
A nice looking audio player that you can use on your website, created by using HML5 Audio, jQuery and CSS.
jQuery Video Extend is a plugin to extend HTML5 videos as: