Objectkitchen is small object-oriented database written in Java. It is currently only usable from PHP, but libraries for other languages (Ruby and Java) are currently being written. You use objectkitchen to store your data in objects, with relations to other objects handled simply by setting the value of an instance variable to another object. Objectkitchen is currently tuned to handle many requests to small datasets, such as those found in most Web sites.
Solido Spam Filter is a high performance, zero maintenance server spam filter. Easy integration is possible through a spamassassin plugin, a SA spamc replacement, sockets, or shell scripts. Its high catch rate and low false positive rates have been proven. The filter will easily handle millions of messages per day on standard modern hardware. All updates are handled automatically.