HTML2PDF : HTML2PDF is a HTML to PDF converter written in PHP.
It allows the conversion of valid HTML 4.01 in PDF format, and is distributed under OSL.
Text_Highlighter : Provides functionality to perform syntax highlighting for different file formats.
DaDaBIK : DataBase Interfaces Kreator - Create a PHP Web front-end for a MySQL PostgreSQL Oracle MS SQL Server database in a minute
Idiorm and Paris : A minimalist database toolkit for PHP5.
Object relational mapper (ORM), fluent SQL query builder and Active Record implementation for PHP.
TCPDF is a FLOSS PHP class for generating PDF documents.