PDFTools by SheelApps - PDFTools
PDF Joiner - This online tool allows you to join several PDF documents into a single file, free of charge.
PDFsam - PDFsam Basic, a free, open source, multi-platform software designed to split, merge, extract pages, mix and rotate PDF files
DocuPUB - DocuPUB is an online file converter, file merger, file compressor, and file resizing tool.
PDF Architect - PDF Architect is a PDF Editor with free functions like rotate, delete and move pages and even more...
PDFill - Open, View, Edit, Save and Print PDF Documents without Adobe Acrobat