Awesome free plugins
The standalone version of MIDI Guitar was designed to be a handy little host of plugins, that does not depend on a complex DAW recording system, making it ideal for rehearsals, live performances or for when you just need a quick creativity boost.
However, you’ll need some plugins to really make it shine. The built-in synths and instruments are really just meant as a starting point. This page details the various types of plugins supported by MIDI Guitar and recommends a few good first synths for new users.