Auto ProxyFilter Test (APFT) automates the testing of safe and unsafe URLs against a content filtering proxy (such as Dansguardian) and helps prevent regressions. APFT is useful to people who are designing filter rules.
jSense aims to be a totally autonomous contentfilter that analyses pages with XML based filter definitions. Its proxy server base will ultimately have support for many protocols other than HTTP. It utilizes pure java and XML.