Use this Ruby SDK to integrate U.S. Department of Labor datasets into your apps. After installing the required JSON Ruby Gem and retrieving the Git repository, use this SDK to access information like: workplace injury and illness rates, mine accident info, employment and wages reports, consumer price indexes, Veteran employment data, BLS numbers, and much more. The API documentation contains detailed instructions on getting started, including extensive code samples.
Genability, an energy data firm that enables new energy companies such as solar developers and EV manufacturers to integrate smart energy solutions into their products and services, recently announced an initiative that will distribute solar savings data, via an API, to consumers and players in the solar energy market.
The non-profit Sunlight Foundation, whose mission is to help others use the Internet to make information about the US government more accessible (and we've covered previously), recently released a very enlightening visualization of campaign contributions from 1990-2008, broken down by industry sectors and party lines.