FILEminimizer Pictures - FILEminimizer Pictures compresses JPEG photos, TIFF, BMP and PNG images and pictures by up to 98%.
Ashampoo® Photo Optimizer - Ashampoo Photo Optimizer 8 enhances your photos at the click of a button! The program fully automatically adjusts colors, contrasts and exposure settings to perfection for individual images or entire collections.
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
Compressor.io - Optimize and compress your images online. Compressor is a lossy and lossless photo compression tool.
iLoveIMG - iLoveIMG is one of most powerful solution that comes with all the major tool you cloud want to edit images in bulk.
Optimizilla - Optimizilla is an online image optimizer uses a smart combination of best optimization and lossy compression algorithms in order to shrink JPEG and PNG pictures to the minimum possible size while keeping the required level of quality.