Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
PDF Joiner - This online tool allows you to join several PDF documents into a single file, free of charge.
FastStone Photo Resizer - Convert and Rename images in batch mode Support JPEG, BMP, GIF, PNG, TIFF and JPEG2000
PDFChef Merge PDF - PDFChef Merge PDF is an online tool that allows you to merge multiple PDf files into one quickly and securely.
ImageMagick - ImageMagick is a software suite to create, edit, and compose bitmap images.
PDFill - Open, View, Edit, Save and Print PDF Documents without Adobe Acrobat