Twinkle Flashcards

Twinkle is a flashcard program for Palm OS that uses spaced repetition.

I've used it to study, it's useful for when you're on the bus, in waiting rooms etc. Here are some flashcard lists to make use of it:

Japanese
hiragana.pdb - hiragana characters with romaji
katakana.pdb - katakana characters with romaji

French
french1.pdb - around 1000 beginner vocabulary words