What iPhone/Android apps would you recommend for French learners?

If you've been around here for a while, you've probably seen my posts about the French Vocab Games app that accompanies the French Linguistics web site.

However, I'm also interested in collecting suggestions for other apps that you would recommend to language learners. Perhaps you have a favourite app that is helping you with your learning? Or maybe even you've written one yourself?

In either case, please submit your app suggestions here! Many thanks!

Neil