An open source web-based flashcard studying system
After skimming the site and code:<p>Do not use this, just use anki.<p>Anki has a free web version (anki web), and has free-as-in-AGPL desktop apps as well.<p>Maybe one day this software will be comparable to anki, but right now it's missing spaced-repetition (which is the only thing that really makes large decks usable), and practically all the other features of anki.