PDF Joiner - This online tool allows you to join several PDF documents into a single file, free of charge.
7-PDF Split & Merge - Functions: Split pdf-files, Merge pdf-files together
PDFill - Open, View, Edit, Save and Print PDF Documents without Adobe Acrobat
Ultra PDF Merger - Ultra PDF Merger is a freeware PDF utility that joins your PDF files, or part of them, together.
CleverPDF - 27 Powerful and Free Online PDF Tools
PDFMate Free PDF Merger - PDFMate Free PDF Merger works as a PDF Joiner, PDF combiner, PDF breaker, image to PDF converter and PDF encryptor. With PDF Merger, you can batch merging pdf files, combining specified pages or converting scanned image file to create new PDF file.