PDF Joiner - This online tool allows you to join several PDF documents into a single file, free of charge.
NeoDownloader - As you know, there is a lot of websites with a lot of pictures, music and movies.
DocuPUB - DocuPUB is an online file converter, file merger, file compressor, and file resizing tool.
WFDownloader App - A free bulk image downloader application that also serves as a multi-purpose bulk downloader for your PC.
PDFChef Merge PDF - PDFChef Merge PDF is an online tool that allows you to merge multiple PDf files into one quickly and securely.
Transloader - Start downloads on your Macs, remotely from other devices