What are some alternatives?
ImageOptim - Faster web pages and apps.
ExifTool - ExifTool is a platform-independent Perl library plus a command-line application for reading...
TinyPNG - Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
PhotoME - PhotoME is a powerful tool to show and edit the meta data of image files.
JPEGmini - JPEGmini - The Photo Optimization Tool Trusted by Tens of Thousands Image Perfectionists
pyExifToolGUI - pyExifToolGui is a graphical frontend for the open source command line tool exiftool by Phil Harvey.