Android/iOS/BlackBerry: gFlash+ is a simple but effective flashcard application. Not only can you browse the extensive gWhiz flashcard catalogue for flashcard sets, you can easily create and import your own from a Google Docs spreadsheet.
gFlash+ sports a simple and easy to use interface, the volume of pre-formatted flashcards is huge (the gWhiz database is large by itself but you can also use flashcard sets from content partners like StudyStack and FlashcardExchange), and you can easily make and share your own flashcards using their basic spreadsheet template. Check out the video tutorial below to check out how to create your own flashcard sets.
gFlash supports multiple quiz modes including matching, side-by-side, multiple choice answers, and flashcards with video and sound embedding. gFlash+ is a free application on all three platforms, gFlashPro is $US4.99 and adds in additional features as well as strips out advertisements. Visit the link below to read more, browse the feature sets for each OS, and check out their extensive collection of flashcards.