Samsung and the Tizen Association recently made the Tizen Software Development Kit for Wearables available from the Tizen developer web site. The SDK supports any wearable running Samsung's Tizen operating system, but that's an extremely limited number of devices at the moment, with just the Samsung Gear 2 and Gear 2 Neo smartwatches filling the space.
MuleSoft has released a parser and Visual Studio extension for its Anypoint Platform that aim to give developers the ability to more easily work with APIs using RAML. RAML is the RESTful API Modeling Language originally based on YAML, that allows developers to document APIs in a human-readable form.
Our API directory now includes 95 sharing APIs. The newest is the Screenhero API. The most popular, in terms of mashups, is the Zillow API. We list 79 Box.net mashups. Below you'll find some more stats from the directory, including the entire list of sharing APIs.