We had talked about couple of software and plugins which helps you to remove extra information like EXIF and meta data from images in order to reduce size. This list is specific for making website loading faster but can also be used for desktop.
Nirmal pointed to another one called as Stripper which works only on popular formats i.e. PNG and JPEG. The best part of the software is its simple. Drag Drop and it cleans it. You don’t have to press another button.
I would suggest you to check on the Preview Only before you drop any files in here. Download Stripper