RsyncGUI 2.3.6 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
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. This free software for Mac OS X was originally developed by Thomas Evensen. The application is categorized as Developer Tools.
From the developer:
RsyncGUI is a GUI on top of the command line tool rsync. The tool lets you synchronize and restore local files on Mac to local storage. In addition, it can synchronize and restore local files on Mac to remote servers connected to Internet or local network.
You may want to check out more software for Mac, such as aRsyncGUI, which might be related to RsyncGUI.