This homebrew app is probably one that I love the most.
We all know that Windows phones lack the option of taking a screenshot.
This app takes care if that, all you need is a developer or higher unlocked phone.
You start the app and then press the camera key half down to capture whatever activity you want.
One can also set it to take screenshots automatically at various intervals of time.
From the app you choose which images you want to keep by saving them to your picture gallery.
We personally recommend this app:P