Sejda (http://www.sejda.org)
An extendible and configurable PDF manipulation layer library written in Java. A ready to use java library to perform PDF document manipulation without having to deal with the low level API.
Sejda offers a set of "ready to go" manipulations implemented using ICEpdf and SAMBox, a PDFBox fork that we maintain, but you can also provide your implementation using iText, iText 5.x, PDFBox or any other PDF engine and configure Sejda to use it.
Quick start: http://www.sejda.org/development/quick-start/
A full list of the available tasks: http://www.sejda.org/development/available-tasks/
CLI Interface
A platform independent CLI (command line interface) is available for download with every new release.
Download latest from https://github.com/torakiki/sejda/releases
Get started: http://www.sejda.org/shell-interface/tutorial/
Web Interface
A web interface is available at http://sejda.com where the most commonly used tasks are available as online services:
Apply header/footer or page numbers to PDF pages
Quality
We put a great effort trying to keep high quality standard for our code base, all the details on SonarQube
License
Sejda 1.x is licensed under Apache License, Version 2.0
Sejda 2.x is licensed under GNU Affero Public License 3.0