Quizlet is the largest independent study site that provides thousands of free, user-created flash cards on a wide range of topics. Users can make their own flashcards or choose from millions of flashcards created by others. There are over 5,000+ flashcard sets on Nursing.
The site provides a variety of games and study modes, including group study. Audio features make it easier to correctly pronounce medical terms. Look for their mobile apps and use flash cards on your phone or ipad. (Note that these are not official Quizlet apps. Rather, they are from third-party developers.)
*Disclaimer: Of course, there are no guarantees--the cards are only as good as the students who created them.