Tomcat is the JSP and Servlet engine that has been in the works for over a year by members of the Jakarta project which is a 'branch' of the Apache Software Foundation.

The goal has been to provide the best implementations of the JSP 1.1 and Java Servlet 2.2 specifications that can be used not only by the Apache Webserver, but other Webservers as well.

The download page should have binaries shortly.