TCPDF : TCPDF is a FLOSS PHP class for generating PDF documents.
Idiorm and Paris : A minimalist database toolkit for PHP5.
Object relational mapper (ORM), fluent SQL query builder and Active Record implementation for PHP.
Clearbricks : No, Clearbricks is not yet another framework. Clearbricks is not cool at all and does not even have a nice website. It won't make you smart neither ha...
Ratchet : WebSockets for PHP
Ratchet is a loosely coupled PHP library providing developers with tools to create real time, bi-directional applications between c...
HTML_QuickForm2 : This PHP package provides methods to create, validate and render HTML forms.
A powerful class which allows to create and merge unified diff patches into any file. Fully written in PHP, uses the GNU standard unified diff format and allows any operation (creation/update/deletion).