Linotype: Letterpress game engine for Ruby
github.com
github.com
While I'm sure it was a fun exercise to build it and there will most likely even be "helper apps" appearing on the App Store soon, I frown upon these. Letterpress will lose a lot of its fun once cheating takes over.
There is no need for a whole game engine if you want nothing more than to know the best possible word to play each turn. It will be enough to win with 99% of people. If you want to win a Letterpress AI tournament, you would of course need to look at alpha-beta and other algorithms.