Jack of Tools Pro, a popular Windows Phone 8 app that offers a number of different tools and utilities in one place, is now currently free to access, although there's no word on how long this situation will last.
The app, which normally costs $1.99 to unlock all of its features, combines a compass, a flashlight, a virtual level, a caliper, a sound meter, and several utilities to help determine your current position. If you have need of those kinds of features, this app is certainly something to look into grabbing for your Windows Phone device.
The app has been available for free for a 24 hour period in the past, so this current situation might not last long. You can download the Jack of Tools Pro app right now in the Windows Phone Store:
Thanks to akoj for the tip!