The 1.1 version of InspectPNG for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This free Mac application was originally developed by opcoders.com. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The application belongs to Design & Photo Tools.
From the developer:
InspectPNG is an app that helps you examine the low-level internals of PNG image files.
You may want to check out more software for Mac, such as PhotoBX+, which might be related to InspectPNG.