Chicktionary
Also have this game in the iPad version. Create words from a given set of letters.
audioBoom
Record your voice and add tags, a picture, geolocations and export it to your computer and/or website
SpellBoard
From spelling words, create quiz where you write it, type it, say the word, use it in a sentence. Take the quiz you create and keep track of your progress.
Pleco Chinese Dictionary
Fabulous Chinese dictionary that has an add-on (in app purchase) that uses the camera in your device to instantly scan, read and translate Chinese characters you see. (OCR)
Rowmote Pro: Remote Control for Mac
Rowmote goes beyond just controlling a Keynote presentation. Use your device as your clicker for anywhere on your computer screen. Great if you are standing across the room!