PDF-XChange Editor - The smallest, fastest, most feature-rich PDF editor/viewer available
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
ScanTailor - Scan Tailor is an interactive post-processing tool for scanned pages.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Briss - Cross-platform application for cropping PDF files in a simple and fast way via a GUI.
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.