Dynamic, browser-based visualization library
Reactive libraries for Angular
Dropzone is an easy to use drag'n'drop library. It supports image previews and shows nice progress bars.
A fast and fully-featured autocomplete library
HTTP mocking and expectations library
Marko template engine
Free and Open source Web Builder Framework. Next generation tool for building templates without coding
HTML5 <audio> or <video> player with Flash and Silverlight shims that mimics the HTML5 MediaElement API, enabling a consistent UI in all browsers.
For slim progress bars like on YouTube, Medium, etc