The focus of Gravity Rock Solid Recommendations is to help its business clients offer personalized recommendations to their customers. Their clients funnel lots of content, like video streaming sites, dating sites, Groupon imitators, classified sites and ad networks to consumers. The Gravity R&D API uses events to track user interactions. From there they import an item catalog to build user profiles to create the individualized recommendations.
Eight APIs have been added to the ProgrammableWeb directory in categories includings Recognition, Analytics, Wi-Fi, and Home Automation. Also new are SDKs for Mixpanel mobile analytics and Untappd, a social applicaiton for beer. Here's a summary of the new additions to the directory.