The simply the best collection of library scripts
A powerful open source PHP library to request a bunch of SEO relevant metrics such as detailed backlink analyses, keyword and traffic statistics, website trends, page authority, Google Pagerank, the Alexa Trafficrank and much more.
A PHP client library for accessing Google APIs. The Google API Client Library enables you to work with Google APIs such as Google+, Drive, or YouTube on your server.
A suite of modular libraries and tools which work together to enable rich interactive content on open web technologies via HTML5. Comprised of: EaselJS, TweenJS, SoundJS, PreloadJS, and Zoe.
An open source library that provides drag'n'drop file uploads with image previews. Dropzone will find all form elements with the class dropzone, automatically attach itself to it, and upload files dropped into it to the specified action attribute. jQuery plugin is optional.