Struts project provides plug-ins for the Eclipse
2.0, Borland JBuilder 5, and Borland JBuilder
6 development environments to enable you to develop web applications based on
the MVC design pattern provided by the Jakarta Struts framework.
Easy Struts is FREE and OPEN-SOURCE. Licensing is provided with the ASF license.
Why use Easy Struts inside Eclipse :
Come to more detail: http://easystruts.sourceforge.net/
Recommend the tutorial