dompdf is an HTML to PDF converter. At its heart, dompdf is (mostly) CSS2.1 compliant HTML layout and rendering engine written in PHP. It is a style-driven renderer: it will download and read external stylesheets, inline style tags, and the style attributes of individual HTML elements. It also supports most presentational HTML attributes.
mPDF is a PHP class which generates PDF files from UTF-8 encoded HTML. It is based on FPDF, HTML2FPDF, and UFPDF, with a number of enhancements.
Project providing a set of classes for the PHP programming language, which allow you to write to Excel 2007 files and read from Excel 2007 files. This project is built around Microsoft's OpenXML standard and PHP. Checkout the Features this class set provides, such as setting spreadsheet meta data (author, title, description, ...), multiple worksheets, different fonts and font styles, cell borders, fills, gradients, adding images to your spreadsheet and much, much more!
Project providing a set of classes for the PHP programming language, which allow you to write to and read from different file formats, like PowerPoint 2007, ... This project is built around Microsoft's OpenXML standard and PHP.
TCPDF is an Open Source PHP class for generating PDF documents. TCPDF project was started in 2002 and now it is freely used all over the world by millions of people. TCPDF is a Free Libre Open Source Software (FLOSS).