multiLibrary 4.2.6 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 program relates to Productivity Tools. 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.
From the developer:
multiLibrary is an easy-to-use yet versatile database for organizing one or more libraries.
By library one should understand Collection of...: in fact you can customize the predefined labels (Name, Title, Subtitle, Volume, Editor etc.) so that they reflect the kind of collection you wish to built; for instance, for your collection of CDs, labels could be set to: Composer, Title, Conductor, Genre etc.
You may want to check out more software for Mac, such as PitStop Extreme, 3dissue or FileOpenInstaller, which might be similar to multiLibrary.