Turbo Camera is a burst mode camera app which can take up to 30 pictures per second.
The feature is said to be perfect for group photos, self-portraits, capturing live action of uncooperative kids or pets, and even time-lapses captures when the speed is dialled all the way down.
Pictures can be exported via email or SkyDrive or even saved as animated gifs.
The app used to be $1.99, but is now free, and can be found in the Windows Phone Store here.
Thanks KV for the tip.