1. Amazon Mechanical Turk. https://www.mturk.com/mturk. Amazon Mechanical Turk. https://www.mturk.com/mturk.
2. iOS App detection. http://www.ihasapp.com. iOS App detection. http://www.ihasapp.com.
3. Language detection API. http://detectlanguage.com. Language detection API. http://detectlanguage.com.
4. Appnation: What a difference a year makes. http://www.nielsen.com 2012. Appnation: What a difference a year makes. http://www.nielsen.com 2012.
5. Appaware. http://www.appaware.com. Appaware. http://www.appaware.com.