Here is a list of third party tools and add-ons that are not included in the main distribution
Realms
OrientDBRealm - Realms for Tomcat 6 and 7 that connect to an OrientDB
UrlRewrite
UrlRewriteFilter by Paul Tuckey, also on googlecode - Filter that performs URL rewriting and redirections, like mod_rewrite in Apache HTTPD, and other typical tasks, like setting request attributes, headers or cookies.
PSI Probe
PSI Probe is advanced manager and monitor web application for Apache Tomcat. It is a fork of Lambda Probe