We were building a new feature for our FAQ-bot[1], that would allow us to perform a search as a fallback, when the bot doesn't have an answer. We then realized that this is actually a useful thing in its own right, so we made it into supersimplesearch. For now we're using Bing as a search engine, but if there is enough interest, we might build our own search engine around this.
[1] https://dialogbar.com/