Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.
Cotrio - The most beautiful way to move your brain and imagination
Yak Tack - remember. words.
Kids First - Kids Videos and Nursery Rhymes – Kids First is a free kid education app developed and published by USP Studios.
Zorbi - Spaced-Repetition Flashcards - Other tools are built by boomers, Zorbi is built by students.
Wikids - An encyclopedia that talks to your kids