The Jakarta Apache Project has released
Tomcat 6.0.18,
an open source servlet container
and official reference implementation of
the Java Servlet API and Java Server Pages.
"This release includes many bugfixes over Apache Tomcat 6.0.16.
Apache Tomcat 6.0 includes new features over Apache Tomcat 5.5, including support for the new Servlet 2.5 and JSP 2.1 specifications, a refactored clustering implementation, advanced IO features, and improvements in memory usage."