Something for people who use PHP for Mac OS stuff - a class wrapper for Theo Hultberg's nice PLIST parsing implementation. Usage example:
include "plist.php"; $plist = new PropertyList("/Users/filipp/Music/iTunes/iTunes Music Library.xml"); $array = $plist->toArray(); echo count($array['Tracks']); 6670
Great for building reports from System Profiler dumps and all sorts of cool stuff. Download here.