WordFreak for

From Hackosphere:

The game will pick a five letter word and you have to guess it. For every guess, the game will show which letters match with the chosen word. If the matching letter is in the same position as the chosen word, it will be marked with red color and otherwise, with yellow color. Version 1.2 shows disqualified letters, added a new list of words from which the game will pick the word for those who have completed 1000 games, and an option for not showing first letter and hide/keep the keyboard after every guess.

Note: The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries."