Twyt is a BSD licensed Twitter API interface for Python. It provides an interface to the remote Twitter API functions and classes to allow easy manipulation of the returned sets of data, such as status messages and user information.
Seevl is a new kind of music discovery engine. It allows you to find how artists are similar to each other and which artists are most similar to each other, among other things. It also allows you to comment on the notes about artists within the database. This is all well and good, but better yet, it has the Seevl API, allowing developers to integrate Seevi into their own applications.