Mootools 1.4.5, HTML, CSS, JavaScript
jQuery 1.6.4, HTML, CSS, JavaScript
jQuery 1.7.2, HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript
jQuery 1.7.1, HTML, CSS, JavaScript
http://webreflection.blogspot.com.ar/2012/03/tweet-sized-queue-system.html
http://james.padolsey.com/javascript/jquery-eventemitter/