MooTune is a MooTools class for logging events, errors and AB tests to multiple backends such as Google Analytics, Mixpanel or your own server logs. It can be used to gain insights into the actions your user’s take on your site, the errors they encounter and the affect of variations on the site with their interactions.

Requirements: MooTools Framework
Demo: http://www.mootools.net/forge/p/mootune
License: License Free