ozone is a transaction-based, object-oriented database management system completely implemented in Java and distributed under an open-source license. It aims to evolve a technology that allows developers to build pure object-oriented, Java database applications. ozone also contains a full-featured XML API that allows you to use it as an XML repository.
p3c is a pop3 checker allowing you to inspect your mailbox before downloading and to delete any unwanted messages. For you to choose wich messages to delete, p3c will show you the "To:", "From:" and "Subject:" portions of the mail and then ask you if you want to delete it or not. p3c works from the console using a simple text interface.
Pagecast submits lists of URLs to various search engines such as AltaVista, Infoseek, Excite, Google, etc. to be indexed. It can run from the command-line or as a mail-robot (email a list of URLs to pagecast@yourmachine). It has a few advanced features such as the ability to rate a URL's keyword-to-title relevance and fix broken meta tags.
PagePoker is a Perl package that defines a browser agent with many powerful features for monitoring and testing Web sites, including elaborate failure handling that can send email and trigger SNMP traps. It comes with three scripts that implement it for different uses: poke.pl, for single agents; pokes.pl, for many parallel agents, and pokehard.pl, for loadtesting and benchmarking.