Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
DVDVideoSoft Image Convert and Resize - Free Image Convert and Resize is a compact yet powerful program for batch mode image processing.
Wondershare PDFelement - All-in-one PDF editor
ImBatch - ImBatch is a batch image processor with a nice graphical user interface.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.