Free PDF writers
CutePDF Writer
http://www.cutepdf.com/Products/CutePDF/writer.asp
PDFlite
http://download.cnet.com/PDFlite/3000-18497_4-75445408.html
PrimoPDF
http://download.cnet.com/PrimoPDF/3000-18497_4-10264577.html
Solid PDF Creator
http://download.cnet.com/Solid-PDF-Creator/3000-6675_4-10480635.html
Free trial PDF editors
Soda PDF
http://download.cnet.com/Soda-PDF-Professional/3000-10743_4-75206048.html
Free online PDF tools
http://www.techsupportalert.com/content/best-free-online-applications-and-services.htm#PDF-Tools