What are some alternatives?
When comparing PDFsam and PDF Merge tool, 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.
PDF-Shuffler - PDF-Shuffler is a small python-gtk application, which helps the user to merge or split pdf...
PDFill - Open, View, Edit, Save and Print PDF Documents without Adobe Acrobat
PDFMerge - PDF Split and Merge tool is implemented using the PdfSharp library and is either GUI or command...
PDFTK Builder - PDFTK Builder is a free graphical interface to for PDFTK, making it much easier to use.
RoxyApps PDF Merge Tool - Merge multiple files of different formats in a single PDF file