HTML_QuickForm2 : This PHP package provides methods to create, validate and render HTML forms.
HTML Purifier : HTML Purifier is a standards-compliant HTML filter library written in PHP. HTML Purifier will not only remove all malicious code (better known as XSS)...
Text_Highlighter : Provides functionality to perform syntax highlighting for different file formats.
TCPDF : TCPDF is a FLOSS PHP class for generating PDF documents.
A minimalist database toolkit for PHP5.
Object relational mapper (ORM), fluent SQL query builder and Active Record implementation for PHP.