Frets On Fire - "Frets on Fire is a game of musical skill and fast fingers. The aim of the game is to play guitar with the keyboard as accurately as possible."
JRPG - "RPG is a kanji learning game styled after the classic SNES RPG games (like Final Fantasy 6, or Legend of Zelda: Link to the Past). The game tries to help you learn how to read and understand kanji in context, and in doing that it also helps you improve your Japanese vocabulary."