SlideIT Norwegian Classic Pack If you use SlideIT keyboard then this will give you a Norwegian key layout for it. Recommend!
English<>Norwegian DictionaryT This free app is an English/Norwegian dictionary with 10,000 words. All words have audio recordings! It has some great features like storing the last 50 words you looked up for easy access, hyperlinks between related words, and more.
Byki Norwegian This is a fun, comprehensive language learning app with photos, written words, and audio pronunciations of the words. It costs $9.99 but is worth it as you really do learn from it. It has lots of learning features like quizzes and you can share your progress to Facebook.
Speak Norwegian Free This app is $3.99 and will teach you 100 often used phrases in Norwegian. It has written and spoken (by a native) examples of the phrases and breaks them down nicely. Great if you just need to learn enough Norwegian to visit Norway.
English Norwegian Tutor This is a fun language learning app that uses a word match game to help you build your Norwegian vocabulary.