Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.
Smallpdf - PDF document management and conversion suite
Image Compressor - Windows/Steam desktop tool to compress images and save size with almost the same quality.
iLovePDF - Free online PDF tool set
Mass Image Compressor - Mass Image Compressor is easy to use - a point and shoot batch image compressor and converter tool for Web site optimization, photographers, HTML game creator and casual Windows users.
Kingshiper Image Compressor - With Kingshiper Image Compressor, you can easily compress, optimize and reduce jpg, jpeg, png, svg and gif file to a smaller size in seconds.