urijs
URI.js is a Javascript library for working with URLs.
@amplitude/ua-parser-js
Detect Browser, Engine, OS, CPU, and Device type/model from User-Agent data. Supports browser & node.js environment
magnific-popup
Lightbox and modal dialog plugin. Can display inline HTML, iframes (YouTube video, Vimeo, Google Maps), or an image gallery. Animation effects are added with CSS3 transitions. For jQuery or Zepto.
jquery-form
The jQuery Form Plugin allows you to easily and unobtrusively upgrade HTML forms to use AJAX.
jquery-serializejson
jQuery or Zepto plugin to serialize a form into a JavaScript Object, using the same format as the default Ruby on Rails request params