Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.

Teachable - Create and sell beautiful online courses with the platform used by the best online entrepreneurs to sell $100m+ to over 4 million students worldwide.

Kahoot! - Kahoot! makes it easy to create, play and share fun learning games in minutes—for any subject, in any language, on any device.

Clever - syncing between education applications for K-12 schools

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.