Front End Technology

HTML + CSS + Javascript
- suitable for beginner and web developer(free)

jQuery
- suitable for heavy web component project(free)
- support Ajax

extJS
- suitable for heavy web component project($)
- support Ajax

Struts2
- suitable for MVC pattern project(free)
- support internationalization(locale)
- support MVC

JSF
- suitable for Java Standard Project(free)
- support internationalization(locale)
- support MVC

Flex
- suitable for MVC pattern project, separate the UI code with back end technology with Web Service/BlazeDS($)
- support internationalization(locale)
- support MVC
- support Ajax(FABridge)

Silverlight
- suitable for .net developer ($)
- support internationalization(locale)
- support MVC
- support Ajax