JACOL is a framework that allows bidirectional
interoperability between Java and Common Lisp.
Its intended purpose is to enable Common Lisp to
function as an extension language for Java, but it
can also be used to expose Java APIs (such as
Swing and DOM) to Lisp applications.
OmniBiff will alert you when you have new email on a variety of mail server types: POP3, IMAP4, Hotmail, Yahoo!, and more. It is written using an OO framework in Java which can be easily extended to support new email servers and new ways of displaying alerts.
Surfboard is a filtering HTTP 1.1 proxy. It
features dynamic filter management through an
interactive HTML console, IP tunneling,
WindowMaker applets, and a suite of filters
including one that replaces banner ads with
technology news headlines.