Apache Web Server
Apache has been the most popular web server on the Internet since April of 1996 and is more widely used than all other web servers combined.
Tomcat
Tomcat is the servlet container that is used in the official Reference Implementation for the Java Servlet and JavaServer Pages technologies. The Java Servlet and JavaServer Pages specifications are developed by Sun under the Java Community Process.
Struts
Struts is an open source framework for building Java web applications. It provides the invisible underpinnings every professional web application needs.
Hibernate
Hibernate is a powerful, ultra-high performance object/relational persistence and query service for Java, which integrates elegantly with all popular J2EE application servers and web containers.
Spring
The Spring Framework is a leading full-stack Java/J2EE application framework, Spring delivers significant benefits for many projects, reducing development effort and costs while improving test coverage and quality.
Clam Anti-virus
Clam anti-virus is an open source virus checker. Because it is free of the burdens of waiting for marketing departments to invent new virus names its often one step ahead of its commercial counterparts.