One of the leading contributors to
PEAR, the standard PHP library
Projects
Lead Developer
DB_DataObject
HTML_Template_Flexy
Maintainer
Services_JSON
Mime_mimeDecode
PHP_Parser
... and a few more...
Non-PEAR libraries
Have a look the the code repository, there is a git clone-able copy of PEAR with extras including
HTML_FlexyFramework - a lightweight powerfull framework
File_Convert - convert one file to another..
File_Mimetype - guess mimetypes or extensions from filenames, or files.