FlipToMind - Space repetition app to help you remember everything
Mochi - Write notes and flashcards with Markdown and study them with spaced repetition.
Technology Logo Memory Game - How many technology can you guess right?
Zorbi - Spaced-Repetition Flashcards - Other tools are built by boomers, Zorbi is built by students.
JavaScript Quiz - Check your knowledge by having fun.
Yak Tack - remember. words.