The PHP Accelerator is an easily installed PHP Zend engine extension that provides a PHP cache, and is capable of delivering a substantial acceleration of PHP scripts without requiring any script changes, loss of dynamic content, or other application compromises.
mediadbs aims to produce a flexible database system for tracking and searching for multiple forms of electronic media (eg mp3, divx, ogg) distributed on multiple servers in a local network.
protosquared is a "data server prototype". It supports several data sources, such as XML and SQL databases and the communication protocol is highly configurable too.