I recently developed WrdWrx, a vocabulary guessing game, now available in the App Store. Think Catchphrase, but focused on individual words rather than idioms or expressions.
If you're looking for something that will encourage meaningful communication among your students, or if you simply like language games yourself, check it out! Try it for free, rate it, and write a review if you find it helpful for your classes!
It's worked great in mine so far!