RealArchiver 2.0.7.3 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.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The software lies within System Tools, more precisely File Compression. The actual developer of this free Mac application is Pierre-Jean Goulier.
From the developer:
RealArchiver is a very easy to use application that allows you to create incremental archives like ZIP stamped.
Each archive can be completed as and when, and each element of the archive can be extracted individually.
Quickly generate incremental archives like ZIP stamped.
You may want to check out more Mac applications, such as GeeUnRAR, Jarzilla or SmartRAR, which might be similar to RealArchiver.