The most popular API, in terms of mashup count, is far and away the Google Maps API, which accounts for 41% of all mashups. But when it comes to the most popular pair of APIs, Flickr and YouTube mashups are the most common. Not to be outdone, Google Maps joins Flickr in a near second place.
A trend is starting to emerge: Advanced technologies are being made available first as cloud services that organizations can invoke easily via an API, rather than having to figure out how to deploy and master themselves. The latest example of that trend is a cloud service from AlchemyAPI that takes advantage of machine learning and computer vision technologies to allow publishers and providers of ad networks to more easily monetize content.