EtsyV2NET, EtsyV2NetSL & EtsyV2CACHE are Microsoft .Net Framework Class Libraries that wraps the Etsy RESTful v2 API. EtsyV2NetSL is for use with Silverlight.
The Libraries are fully OAuth v1.0a compliant (no 3rd party library required). Support for Public/Private Create/Read/Update/Delete/Upload API methods with Synchronous & Asynchronous calling. All Etsy V2 APIs are supported.
The daily deal space is hot, and has been for some time now. In the past year 23 million Americans have purchased a daily deal or group coupon according to a survey conducted for the American Institute of CPAs by Harris Interactive (source). Not to mention Freelance websites, such as Freelancer and Elance, have been flooded with thousands of "Groupon clone", "daily deal site" and related job postings - a general sign that many more businesses are still trying to get in.
Over there, by the gum and the tabloid magazines, there's an API. Literally, it's a piece of plastic, but behind it is a company and the APIs that company uses to make the whole operation work. Blackhawk, a subsidiary of Safeway, distributes gift cards for many big-name stores in 90,000 retail locations. And while the cards have always been supported by backend systems, mobile is moving this ten year-old company to an open API approach.