Pretty good app that sources from sparknotes. Never a substitute for reading a text, but this app will help you understand themes, important quotes, etc., from any popular text you are studying.
Awesome language-learning tool. This app can give you a placement test in a language you already know so that you start at your ability level - or start from scratch learning any language!
A great app for translating when you are stumped while studying, or of course in-action traveling overseas. The active camera translate feature is especially awesome.
This app offers examples of translations that have already been done on other sources, be they academic, professional, or technical. Also has example sentences and recorded pronunciations.
A handy website and app that helps you to reliably translate from one language to another. Particularly helpful are the moderated forums at the bottom of each list of translations - newer terms can be found here (think “kite-surfing”) or words used in a very particular context. Available on iTunes app store or Google Play