Guess a word in up to five attempts. First suggest any word. Now the application indicates the letters that occur in the wanted word. Now, with this indications, you are ready to suggest a new word. Languages: Englisch, German, Dutch
Crazy Letters was one of my first apps for Mac OS X.
A very similar game is playable on the website of the New York Times. It's named Wordle. The differences: You don't have to play under pressure and you've got six tries – but there's only one word to guess per day.