Compressify - Compress video files by 20-60%
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
Big Photo - Overcome the image resolution limit on iOS devices
ImageOptim - Faster web pages and apps.
TinyJPG - Compress JPEG images with perfect quality and file size
Caesium Image Compressor - Compress your pictures up to 90% without visible quality loss.