RBVersioner 1.1 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.
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. This Mac application was originally designed by True North Software. The program lies within Developer Tools, more precisely IDE.
From the developer:
RBVersioner is a tool to manage REALbasic "rbx" style plugins. The rbx format for plugins is a cross platform plugin format. There are many advantages to the rbx format, but version control is not one of them. In the design of the rbx format, REAL Software did not define a convention for representing the version numbers of plugins. With the old style plugins you could get the version number from the Finder.
You may want to check out more Mac applications, such as CVSServerSetup, jKaiUI or Con Wylie's Script Generator, which might be similar to RBVersioner.