Metadata++ - Homepage of Metadata++, free, intuitive and powerful EXIF, IPTC, XMP, ICC, GPS viewer/editor.
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
Exif Pilot - Exif Pilot is a Free EXIF Editor that allows you to manipulate META data within image files.
ImageOptim - Faster web pages and apps.
Jimpl - Free online photo metadata and EXIF data viewer. Uncover hidden data of your pictures. Upload a photo to find where, when, and how it was taken.
TinyJPG - Compress JPEG images with perfect quality and file size