Flashlight - Control your Mac with a keystroke.
Tiny Flashlight + LED - Tiny Flashlight + LED is free to use application that can be used anywhere else, having nicely built-in functionality.
Hmu - Hmu is a social app by SC Friends that enables users to search for new friends by viewing a list of users from all around the globe and tap on the desired profile to engage in live chat with them.
Screen Torch Advanced 2 - "Screen Torch Advanced 2", is an handy torch program. It only uses devices' backlight.
Torchie - Touch to Torch
Online People-Meet New People - Online People-Meet New People app enables you to view the profile of strangers without letting them know to make new friends matching your personality and interests.