PDFsam - PDFsam Basic, a free, open source, multi-platform software designed to split, merge, extract pages, mix and rotate PDF files
PDF Joiner - This online tool allows you to join several PDF documents into a single file, free of charge.
Master PDF Editor - Master PDF Editor is complete solution for editing PDF and XPS files.
DocuPUB - DocuPUB is an online file converter, file merger, file compressor, and file resizing tool.
PDF-Shuffler - PDF-Shuffler is a small python-gtk application, which helps the user to merge or split pdf...
PDFChef Merge PDF - PDFChef Merge PDF is an online tool that allows you to merge multiple PDf files into one quickly and securely.