Download it at http://jakarta.apache.org/builds/tomcat/release/v3.1/
In addition to continuing to supporting the latest Java Servlet and JavaServer Pages Specifications, this release contains a number of improvements over the Tomcat 3.0 release: * Thread pooling and JVM load balancing * ISAPI and NSAPI integration * A Command line JSP to Servlet Code tool * Automatic generation of Apache configuration files * Automatic deployment of Web ARchive (WAR) files * Logging * Substantially improved documentation * Experimental servlet reloading * Experimental security implementation * Minimal Admin/Deployment Tool * Internal APIs were changed for flexibility and integration * The source code was cleaned and reorganized * Most non-essential code was moved out of tomcat.core * Greater platform / JVM level coverage * Many, many bugs were fixed. - Sam Ruby
