When Apple said "there's an app for that" with regard to the huge App Store library, it wasn't kidding. German company HMB-TEC has listed some apps which, together with accompanying hardware, will turn your iPhone into a fan, flashlight, laser pointer, and even a stethoscope. Yes, a stethoscope, that thing doctors put to your chest to hear your heartbeat.
This draws power directly from the handset, connected through the 3.5mm connector only. I guess we can stop referring to this port as the "audio jack" now that it does so much more.
Each one of these accessories comes with an app you can download from the App Store. Most aren't free, so remember to factor in the software cost when ordering the products. Watch the videos to see the iPocket fan and laser pointer in action.