The Europeana Ruby SDK by Europeana allows developers to integrate the Europeana API's methods for searching and retrieving records into their Ruby applications. This SDK is offered under the EUPL v1.1 license.
CityDeals.com, local/national deal and discount finder, enables developers to access its deals database via the CityDeals API. Third party apps can feature daily deals and discounts, or provide a searchable interface of CityDeals.com's entire portfolio of discounts. CityDeals.com partners with retailers and service providers around the globe to provide an expansive offer of discounts applicable on a national scale or at the local level.