Smartphone Apps

My sister and I both have Droid 3s, and last night we were talking about how there’s apps for so many different things. She showed me the Brightest Flashlight app, which turns on the camera light and makes the display shine brightly. Then I thought that there was probably even a smoke detector app, and surely enough, there is! The one I got is called Smoke Alarm by Ambick Software. It displays a square smoke alarm, and when you touch it, it beeps. Do any of you guys have similar apps? I have a feeling that many of you do, but I just thought of it last night.