What are some alternatives?
When comparing PDFsam and PDF-Shuffler, you can also consider the following products
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
PDFTK Builder - PDFTK Builder is a free graphical interface to for PDFTK, making it much easier to use.
PDFill - Open, View, Edit, Save and Print PDF Documents without Adobe Acrobat
PDF-XChange Editor - The smallest, fastest, most feature-rich PDF editor/viewer available
PDFelement - All-in-one PDF editor
UnityPDF - UnityPDF lets you merge, split, divide, rotate, protect PDF files and more.