"Magister" is also a German academic title (that was not uncommon in Germany before the Bologna reform to graduate in especially in humane disciplines). But it's only common to adress someone as "Herr Magister" in Austria.
No it does exist in Germany too, my mum has one.
It exists in Georgia as well, and it is equivalent of Masters degree.
Although, it is not used as title - maybe because it would sound much cooler than Dr. :)