http://www.libreoffice.org/

http://www.smartpdfeditor.com/?gclid=CNSs6e7O8qsCFYpn5Qode1iTHg

http://www.pdfescape.com/

http://code.google.com/p/pdfeditor/downloads/list

http://fineprint.com/pdf/

http://www.opensourcetutor.com/2009/10/01/an-open-source-pdf-editor-for-windows-mac-linux/

http://stefaanlippens.net/pdf2ps_vs_pdftops

http://www.dopdf.com/

doPDF is a free PDF converter for both personal and commercial use. Using doPDF you can create PDF files by selecting the “Print” command from virtually any application. With one click you can convert your Microsoft Excel, Word or PowerPoint documents or your emails and favorite web sites to PDF files.

http://www.cogniview.com/cc-pdf-converter.php

The CC PDF converter (beta) is a free (open source) application that enables you to create PDF documents from almost any application (Word, Excel, Internet Explorer and more). The CC PDF Converter also allows you to easily embed a creative commons license in your PDF file.

http://www.primopdf.com/index.aspx

Create PDF files from 300+ file types Make PDF files for different uses, including online viewing, eBooks, office printing, and prepress Append PDF files after they are converted Secure with passwords and add document information (title, author, etc.) during creation Fast, intelligent one-button creation from Microsoft® Word, Excel®, and PowerPoint®

http://www.cutepdf.com/products/cutepdf/Writer.asp

CutePDF Writer (formerly CutePDF Printer) is the free version of commercial PDF creation software. CutePDF Writer installs itself as a “printer subsystem”. This enables virtually any Windows applications (must be able to print) to create professional quality PDF documents - with just a push of a button!

http://www.exp-systems.com/PDFreDirect/Features.htm?1

The full-featured freeware alternative to PDF995 and CutePDF. Features: Merging, Encryption, Optimizing, Preview, Preferences. Completely Free: No popups (unlike PDF995) and no watermarks.

http://www.fineprint.com/products/pdffactory/index.html