LED Flashlight is an application that turns the camera flash into a pocket flashlight. The idea isn't very original, but the application is well-made, simple and ad-free.
A not-so-common feature, considering that it also allows you to customize the flash of the light (so you can turn it into a stroboscope or emergency signal). It also has a built-in compass! An excellent choice.
Download Flashlight: LED Torch Light 1.6.32 in