Adobe Flash Web 2.0 UI frameworks like Prototype, Scriptaculous, JQuery & YUI Web application development stacks like LAMP( Linux, Apache, Mysql, PHP) and JSP/Struts/Hibernate/Spring Mobile application development stacks for iPhone & Andriod Content Management Systems like Drupal, Wordpress, Joomla etc. E-Commerce Systems like OS commerce, Magento commerce etc. Application development for social networking sites like Facebook, Orkut etc.