MultiDockX for Mac relates to Theming Tools.
From the developer:
MultiDockX is intended to extend the usefulness of Apple's Dock software that is currently being shipped with OS X. The main problem with the Dock application is that many users will want to load it up with so many programs that the icons get so small to the point that they are hard to see and difficult to manage.
You may want to check out more Mac applications, such as Occurrence Selector, which might be related to MultiDockX.