Last.fm iOS and Mac OS X SDK is a development kit created Kevin Renskers. Using the SDK, developers can work with blocks, use only KissXML as a dependency, return values in correct data types, hook catching methods, and cancel operations. This kit is actively developed and maintained and used in the official Last.fm Scrobbler app. Other apps using Last.fm include MetroLyrics and Radio.com. Requirements to develop include iOS 4 and Xcode 4.4 or higher, an API Key obtained at last.fm/api, and Kiss XML.
GoodGuide is a service that we have been using as a family for a while. It attempts to analyze a product holistically to produce a simple 1 to 10 rating of its 'goodness.' I am personally satisfied to see that the GoodGuide API will share this data with the world. Many consumers would love to choose products based on their total “goodness” but how can you possibly investigate all the companies and products that are out there?
The power of choice is a valuable part of our everyday lives, and with so many options at our disposal along with wildly different tastes and opinions, it's a good thing we have the freedom to choose. Based on this idea, it's easy to see how things like music charts, recommendations from film critics and general ratings on social media platforms may not be the opinions shared by everybody, and a recommendation system that could focus more on a person's specific preferences would be quite useful. That's pretty much what Tumbz has set out to do. The Tumbz API also makes it possible for this functionality to be integrated with other applications.
The legendary Billboard charts are now open for mixing, not by DJs, but by programmers. Billboard, a service of Nielsen Business Media, has a new API that lets developers search and read information from all the Billboard historical charts. The initial offering is its Chart service and later on Billboard will "roll out the Artist and Track services to add even more depth and perspective." the API is a simple REST interface that developers can send HTTP GET requests to in a familiar service/version/resource fashion. We've added a new Billboard API profile with details.