- cats filetype:pdf: Google search for .pdf files; substitute the word "cats" for anything you want
- cats originurlextension:pdf: Yahoo search for .pdf files; again, substitute the word "cats" for anything you want.
- Yummy Personal PDF Library: You can browse through lots of interesting .pdf manuals and books here.
- Create a Graph:Create a graph and then save it in a variety of different file formats, including .pdf.
- Printable Paper Rules: available in .pdf format

