PHP Excel Reader – Parse and retrieve information from XLS files
http://code.google.com/p/php-excel-reader/

PHPExcel – OpenXML – Read, Write and Create Excel documents in PHP – Spreadsheet engine
http://phpexcel.codeplex.com

PHPDocX is a PHP library designed to generate completely dynamic, fully customizable and digitally signed Word documents.
http://www.phpdocx.com
Demo: http://www.phpdocx.com/demo/sample-word-report

HTML 2 PDF – Get a HTML text and generate a PDF file to make it printer-friendly. More info can be found on the http://html2fpdf.sourceforge.net
http://sourceforge.net/projects/html2fpdf/
Demo: http://www.tcpdf.org/examples.php

dompdf is an HTML to PDF converter (PHP5)
http://code.google.com/p/dompdf/