Decks - Decks is a study application designed to keep all your stuff in one place, instead of having an app for flashcards, another for notes, and one to watch tutorials, create a deck and keep everything organized there.
PencilCase - Transform your designs into native iOS apps in a heartbeat.
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.
LetterNote - Fine Stationery, Art Prints, Accessories & Collectibles
Flashbee - Learning Made Fun
Rainbow Pencils - Make rainbows whenever you sharpen.