zGallery 4.65 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application lies within Design & Photo Tools, more precisely Viewers & Editors. The actual developer of this software for Mac is zCommander Apps. 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.
From the developer:
zGallery is a picture and photo viewer that shows, browses, and edits images. The tool supports most common image formats and thumbnail browsing for all types of files. The utility provides file management functions, such as copy, move, delete, etc., as well as image editing functions like rotating, flipping, resizing, and changing the format of selected images.
You may want to check out more Mac applications, such as 3D Image Commander, UnCoverIt or Panoweaver, which might be similar to zGallery.