No need for a flashlight app, I just bring up the main screen and its enough to find the power cord in my bedroom. It's bright enough that I can walk around my bedroom without problems. I don't carry a flashlight to bed because I usually just got out of the shower and have nowhere to keep it. (well, except there, but I'm not going to put a flashlight there)
Pandora-Free custom music stations.
GPS Drive by MotionX-Cheapest GPS navigator. Works slightly better than the default one.
Shazam- Play name that song.
Geocaching- Find Geocaches.
RedLaser-Scan bardcodes on items and see prices for online retailers.
Labryinth 3d- Fun marble game.
Epocrates-Useful if you are into medicine at all. Has a bunch of med calculators and info on almost every pharmaceutical that exists.