From: http://www.wikihow.com/Fix-Samsung-Galaxy-S3-That-Won't-Connect-to-Your-PC

http://www.gottabemobile.com/2013/03/01/15-hidden-samsung-galaxy-s3-features/

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/270#post_8660606

  A standard USB DAC operates only as a USB peripheral. It only interworks with a USB host.

The SGS3 is a USB On-The-Go device.

  A USB OTG device can act as a USB host or as a USB peripheral.

  Turns your cell phone or tablet into a USB host.
  Allows you to connect USB accessories such as keyboards, mice, flash memory drives
  and memory card readers to your device. Enhances the capabilities of your device, 
  providing a solution for user-friendly removable data storage or the sharing of 
  your favorite multimedia files.
  
  Simply put, a USB OTG device, like the SGS3, acts as
  . a USB peripheral when a Micro-B plug is inserted [regular cable]
  . a USB host when a Micro-A plug is inserted ["OTG cable"]
  

http://www.head-fi.org/t/595071/android-phones-and-usb-dacs/150#post_8530235

  Android phones and USB DACs	 - Page 11

http://www.knowyourcell.com/news/1536735/samsung_galaxy_s3_30_tips_and_tricks.html

http://forums.androidcentral.com/verizon-galaxy-s-iii/223893-must-have-apps-s3.html

Airdroid
Camera ZOOM FX
doubleTwist
mVideoPlayer

Brightness Disc (widget for adjusting screen brightness - auto brightness tends to use more power)
Amazon MP3
Kindle
Dolphin
Dropbox
Box
LinkedIn
WebEx
GasBuddy
NFL Mobile
GoogleTalk (great video calling)
Words with Friends
Touchdown HD (for corporate Msoft exchange email, contacts, calendar and tasks)
Tango http://www.tango.me/
Skype

Social:
Snapchat
Twitter
Instagram
Facebook
Games:
Bike race
Call of mini
Mad skills mx
Aliens
Drag Racing Bike Edition
Line Runner
Tower Defense
Gyro
Jetpack Joyride
Ninjump Deluxe
Boggle
Misc.:
Google Sky map
Swiftkey (you have to buy this)
Flashlight
Pandora
Whatsapp
Ifunny
Zombies, Run! (if you like going for jogs)
FML
Gsam Battery