memordo - Spaced repetition tool to help you retain more knowledge
Lexica - An open source word-search game.
Harken - Flashcard app using smart repetition to improve your memory
Wordbase - Wordbase - the fun, addictive and challenging game of words and letters for iPhone!
Zorbi - Spaced-Repetition Flashcards - Other tools are built by boomers, Zorbi is built by students.
Ruzzle - Ruzzle is a fun and fast-paced word game where you can challenge your friends or allow an opponent...