There is a terrific new screenplay font called "Courier Prime". It's free, it's better in some ways than the Final Draft font, and it's automatically included in DubScript. For some reason, it does not seem to play well on some Froyo (older Android 2.2) devices. On such machines, Courier Prime is disabled by default.
Additionally, DubScript now allows you to use over 800 different fonts when writing. Choose your favorite to suit your mood or genre.