Train yourself with flashcards, but faster. Made with an emphasis on speed for internalizing responses as a reflex.
Speedcard will flash a card at you, and you must select the correct answer as quickly as possible. Keys 1 through 9 are usable as shortcuts for the first 9 buttons.
Statistics about your performance will be displayed in the upper-left-hand corner. The upper-right-hand corner has controls for the trainer, including a start/stop button, a reset button for the statistics, and a dialog for editing flashcards and changing settings.