Probability.js
Probability.js makes it easy to call JavaScript functions by probability in Node.js and the browser.
Path.js
Simple, lightweight routing for web browsers
P5.js
A JS client-side library for creating graphic and interactive experiences, based on the core principles of Processing. http://twitter.com/p5xjs —
Moovie.js
Movie focused HTML5 Player
Maria
The MVC framework for JavaScript applications. The real MVC. The Smalltalk MVC. The Gang of Four MVC.
Jsblocks
Better MV-ish Framework
Java Script Load Image
JavaScript Load Image is a library to load images provided as File or Blob objects or via URL. It returns an optionally scaled and/or cropped HTML img or canvas element. It also provides a method to parse image meta data to extract Exif tags and thumbnails and to restore the complete image header after resizing.
J Query.black and White
Clientside grayscale images on any browser
Hook.js
Pull to refresh. For the web.
Highway
A fast, lightweight and simple Javascript routing library with no dependencies.
Gitdown
GitHub markdown preprocessor.
Elastislide
Elastislide is a responsive image carousel that will adapt fluidly in a layout. It is a jQuery plugin that can be laid out horizontally or vertically with a pre-defined minimum number of shown images
Custombox
Modal Window Effects with transitions CSS3.
Comic.js
Cartoon style drawing for HTML5 Canvas & Raphael.js & D3.js & SVG.js
Backgrid
Finally, an easily stylable semantic HTML data grid widget with a Javascript API that doesn't suck.
Superstruct
A simple and composable way to validate data in Javascript.
Vux
Mobile UI Components based on Vue & WeUI