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
DocuPUB - DocuPUB is an online file converter, file merger, file compressor, and file resizing tool.
PDF-XChange Editor - The smallest, fastest, most feature-rich PDF editor/viewer available
PDFill - Open, View, Edit, Save and Print PDF Documents without Adobe Acrobat