I've made a simple flashcard / quiz based app for learning Dutch verbs. The primary reason I made this app is because I've just moved to the Netherlands and thought it would be nice to have something to do (without sound) on my phone on those off-moments that was actually useful. There's a lite/trial version with a limited amount of verbs and a full version for 99c. Any feedback is very welcome.
Here's the official webpage with QR codes/Market links