SoundManager 2 : Using HTML5 and Flash, SoundManager 2 provides reliable cross-platform audio under a single JavaScript API.
wysihtml5 : an open source rich text editor based on HTML5 technology and the progressive-enhancement approach.
Docusaurus : Easy to Maintain Open Source Documentation Websites
LeanBack Player : LeanBack Player is a Javascript based HTML5 Video and Audio Media Player UI that uses build-in HTML5 and element functionality of standard browsers,...
jsPDF : A HTML5 client-side solution for generating PDFs. Perfect for event tickets, reports, certificates, you name it!