AJS is described as 'Ultra lightweight JavaScript library that is around 2 years old. It is inspired by MochiKit, but differs by being small and expressive. The current version is only 33 KB (uncompressed!), whereas MochiKit and other libraries such as JQuery, Mootools or Prototype is' and is an website in the development category. There are more than 10 alternatives to AJS, not only websites but also apps for a variety of platforms, including Self-Hosted, Mac, Windows and Linux apps. The best AJS alternative is jQuery, which is both free and Open Source. Other great sites and apps similar to AJS are DHTMLX, Ext JS, Zepto.js and Dojo Toolkit.