Locu, one of CNN's hot startups to watch, has released an API that exposes Locu's database of business information to third party developers. Locu launched the Locu API at Tech Disrupt SF 2012 and drew immediate attention. The API allows developers to retrieve real-time business data (e.g. venue information, pricelists, menus, etc.) and integrate the data into existing applications. Locu's index crawls the web for business data, and the API makes that data available to other websites and applications.
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.
GitHub, the very popular online hosting service for Git-based development projects, has released a second version of its API (our GitHub API Profile). Although the API is still in development, the various types of methods offered by the API provide a good base for developers to further integrate with GitHub.