Pydora is a Python-based implementation of the Unofficial Pandora API. While Pydora is fairly complete, it doesn't include any of the undocumented features, or most of the account management features, of the API.
Naspter is one of the most recognizable names in digital music, being one of the first music distribution platforms when it was released way back in 1999. After much controversy, and changing hands several times in the last 10 years, it is now owned by the US electronics retailed Best Buy. Now the technology behind Best Buy Remix, the open API for Best Buy's product catalog, has been released to the public with the Napster Access API (for technical details see our new Napster API profile).
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.