This super lightweight site helps studying kanji go faster. Just enter the English meaning for the kanji presented. If it turns green and shows all of the meanings, you got it right! If nothing happens, try again.
You can choose five different decks which are based on the JLPT levels, randomize the decks so you aren't just memorizing the order, and change the font between the three most common.
That's it! The site's creator made it for personal use, but if anyone wants to do some last-minute cramming before the JLPT, it's super fast with no signup required.