The 3.0 version of Fredtneck for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The unique ID for this app's bundle is com.operasoftware.Widget.Fredtneck.
The most popular version of the tool is 3.0. The program lies within System Tools, more precisely Dashboard Widgets. 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 actual developer of this free software for Mac is mrgnu.
From the developer:
Fredtneck is a scale browser, using svg to render (parts of) the neck of a guitar. It displays each note in the selected scale on all (visible) positions.
This widget may be very helpful for the professional musicians as well as for those who are regular music funs.
You may want to check out more software for Mac, such as iPhone apps, Digital Clock Widget or I Can Has Cheezburger, which might be similar to Fredtneck.