Adobe Acrobat is a useful tool for creating and editing PDF files. You can use it to add page numbers in a variety of styles to your PDF documents, including the Bates numbering system that's ...

Gimp is normally used to create or manipulate images files, but can also work with PDFs if you understand how it works and what it's limits are. If you’ve never used Gimp—a free image editor available ...

Smallpdf is a solid online PDF editor for making basic changes to documents on the fly. Smallpdf is a free online PDF editor that offers a limited but useful set of editing and conversion tools.