Wildcard Dictionary helps you find words that you dont know exactly how to spell. It is also a great app for helping out in word games.
You can enter a word to search for emitting letters and replacing them with wildcard characters. A list of matching words will come up. You can also see the definitions for the words.
A great use is for word games. Playing a game that you need a word for that has a specific letter criteri and cant think of one? Just enter it into Wildcard Search and see your results.