Tinycards is an app from Duolingo that gives you flashcards for hundreds of topics. We really liked Tinycards when it launched on iPhone last year, and now the tool is available on the web.
Duolingo is best known as a language learning tool, but Tiny Cards isn't limited to just languages. Sure, you can still use it to learn languages like Russian, Spanish, or French, but you can also learn about the muscular system, mythical creatures and even Star Wars characters.
Users can make their own flash cards, so the possibilities are limitless. Flash cards are just one of many useful tools for learning something new, but Tiny Cards is free, easy to use, and a great distraction throughout the work day.