try www.javasoft.com You might need to upgrade tomcat though. I think only the latest support servlet 2.3. Not sure about ther version #. Just check it out at their site.
Hi, Tomcat added support to Servlet2.3 and JSP 1.2 on Tomcat4 , the version called catalina, so look for it, WebLogic 6.x also suppports this specifications and also EJB2.0