pdfForts

Recently I've been using various pdf tools to watermark pdf's and generally play about with them. They are pdfForts from https://github.com/sjau/pdfForts and have various tools, like -

addPasswdPDF

This script adds a password to the PDFs.

bookmarkPDF

Lets you edit the current bookmarks and apply them to the PDF.

combinePDF

Combine PDFs and maintain bookmarks.

extractPDF

This script lets you extract one or more pages from PDF.

extractTextPDF

This script lets you extract text from a PDF.

metaPDF

Add meta data to a PDF.

ocrPDF

This script converts image PDFs to text files using tesseract.

rmPasswdPDF

This script creates a copy of a PDF without password. The password must be known.

rotatePDF

Rotate a PDF by 90°, 180°, 270° clockwise.

stampPDF

This script just adds a document number and page number on a bunch of selected pdfs.

watermarkPDF

Lets you add a watermark across the PDF.

As this is from a git repository you need the following commands to get them, and to keep them updated -

git clone git://github.com/sjau/pdfForts

and to update -

git pull origin master

They all require you to use linux, with its various distributions of your choice, and to use KDE as your desktop environment, or have it installed. I use GNOME but do have KDE installed and use some of its programmes. They are in active development so you need to update occasionally.