Alexandria is a library of PHP bits and pieces, some of them PHP scripts, some of them PHP extensions that we at OmniTI have produced and used for various projects. We've published them in the hope that they will save others some time and energy.
Alexandria is a library of code, not a framework. It doesn't want to be a framework and doesn't pretend to do everything that you need, but it might just have that gem you were looking for.
This document is structured in the form of a guide to using various pieces in the library, followed by a reference section generated from the source code. You should expect these docs to evolve over time as more information is added.