Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.
Clever - syncing between education applications for K-12 schools
Anki - Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Brainscape - Find, create, and study SMART FLASHCARDS on any device. DOUBLE your learning speed using the most effective study system on the planet. Keep all your content in sync across Brainscape's website and your Android devices.
Claroline - Claroline is a collaborative eLearning and eWorking platform.