There are some areas of typography that seem underdeveloped, for example Monospaced fonts. David Jonathan Ross applied the core concept to proportional fonts, so they feel monospaced without the limitation of fixed width.
With Sans, Serif and Monospaced, Italics and 4 widths in multitude of styles (that even account for white type on dark background!) it is a very usable type system.
You can get it at the beautiful minisite with a lot of process explanations.
Input is free for personal use, and quite cheap for commercial use.