jPDF Tweak is a Java Swing application that can combine, split, rotate, reorder, watermark, encrypt, sign, and otherwise tweak PDF files. Developed by Michael Schierl
License: Open Source
jPdf Tweak is a free and open-source PDF editing tool suitable for basic tasks, while Adobe Acrobat DC offers a comprehensive suite of features aimed at professionals, including advanced editing, OCR, and cloud integration. The choice between them largely depends on the user's needs, budget, and the complexity of the tasks they intend to perform.