While it's not an app, here's a really in depth article about best practices for typography that helped me out a lot: http://www.smashingmagazine.com/2009/08/2

While it's not an app, here's a really in depth article about best practices for typography that helped me out a lot: http://www.smashingmagazine.com/2009/08/20/typographic-design-survey-best-practices-from-the-best-blogs/ http://www.smashingmagazine.com/2009/08/20/typographic-desig...