What you need: Apple iPhone; Wikipanion app, Free 

Risk level: High

Despite studies showing that Wikipedia is nearly as accurate as commercial encyclopedias, professors, and teachers would still prefer you not use The Free Encyclopedia when studying or writing reports. We say heed their warning and follow the rules. For those of you iPhone owners writing a report from Wikipedia while you read this, download the Wikipanion app. With full-page search, the option to bookmark articles and certain portions of articles,  it’s perfect for quickly referencing info when writing a report or taking a quiz.