Duck+Duck+Go

 [|Duck Duck Go]   though in the purest sense not a totally curated search engine, aims to try to bring up the most 'official' page first, and if the search terms has a Wikipedia page, it will also include a short blurb from Wikipedia, as well as related search terms in a box at the top of the page.

Benifits of Duck Duck Go... - gives a short run down of what you have searched at the top of the page - gives related searches and refines searches - has a search filter

However... - doesn't have a refined search