NOTE: Does not work with Lion, Mountain Lion Mavericks, Mojave and Catalina OSX

MasterWriter is one of the most remarkable software programs ever
developed for the songwriter. Its unique features together with an amazing
array of reference dictionaries provide the songwriter with everything he
or she needs, in one easy to use program. Why struggle to find the right
word or phrase when you can have all the possibilities in an instant. In
a world where good is rarely good enough, MasterWriter will be an
invaluable tool in helping the songwriter consistently create the
exceptional.

http://www.masterwriter.com/