Google has released version 3.0 of the YouTube Data API which includes new functionality and features including Topics API, Universal Search, Channel Bulletin Post, Full Subscriber List Management, and more.
Our API directory now includes 56 billing APIs. The newest is the Merchee API. The most popular, in terms of mashups, is the Stripe API. We list 5 Stripe mashups. Below you'll find some more stats from the directory, including the entire list of billing APIs.