Download of SmashTunes 4.6.1 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. SmashTunes for Mac lies within System Tools, more precisely Plugins & Addons.
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 most popular versions of the tool are 3.0, 2.2 and 2.1. The actual developer of this Mac application is SmashBits.
From the developer:
SmashTunes is an iTunes and Spotify controller that lets you control iTunes and Spotify by keyboard shortcuts. It displays the currently playing song in your menu bar and artwork floating in a window. This means no more interuptions of your work, to lookup what song's palying. From the menu you can control iTunes and Spotify, and rate the song as well. Features Spotify and iTunes control Media keys support.
You may want to check out more software for Mac, such as iBatch for iTunes, Amarra Hifi or Zeus Terminal Lite, which might be related to SmashTunes.