Jakarta Tomcat is a web server written in 100% Pure Java. The
Tomcat 4 branch is the reference implementation for the Java
Servlet 2.3 and JavaServer Pages 1.2 technologies.

Tomcat 4.1 is a refactoring of Tomcat 4.0.x, and contains significant
enhancements, including:

o JMX based administration features
o JSP and Struts based administration web application
o New Coyote connector (HTTP/1.1, AJP 1.3 and JNI support)
o Rewritten Jasper JSP page compiler
o Performance and memory efficiency improvements
o Enhanced manager application support for integration with development
  tools
o Custom Ant tasks to interact with the manager application directly from
  build.xml scripts


WWW: http://jakarta.apache.org/tomcat/