This independently constructed answer library written in C# is made for .Net applications to interface with the DuckDuckGo Zero Search API. Though not officially supported by DuckDuckGo, the library is listed on the DuckDuckGo API documentation under supporting library integrations. DuckDuckGo is a search engine which distinguishes itself by not tracking its users or generating results based on its user's previous behavior. The DuckDuckGo Instant Answer API provides free programmatic access to many of the search engine's instant answers, pulled from over 100 independent sources.
Yahoo! BOSS, the Build Your Own Search Service, has seen a series of upheavals in the last two years. When Yahoo! announced its Search partnership with Microsoft, it looked that Yahoo! BOSS might not survive for long. However, that was not the case. Yahoo! BOSS has come back strongly this year with paid version V2 and major updates to the BOSS API. In a sign that it is alive and kicking, it has announced a new home for Search BOSS and three new product offerings under the BOSS umbrella along with API updates.
While Google leads the way in web search and Yahoo leads the way in answers, many upstart services are attempting to help you make decisions by giving you smarter answers to your questions. Microsoft has billed its new search offering Bing as both a "decision engine" and an "answer engine." Now there's Hunch, a new start-up founded by Flickr's Caterina Fake, which also aims to be a decision engine, but using a very different model. By first asking the user questions ranging from food preferences to pet peeves, Hunch tries to provide answers to questions that best match the user's interests based on crowdsourced data collected from other users.