[Pwnguinz]

Behind the scenes, DDG uses Yandex and Bing to power its search results. It also does its own crawling (however, I'm not sure to what extent).

Their algorithm isn't necessarily better, but if you were to just give it a try, you'll notice their 'Instant Answers' section at the top of a search that usually gets you exactly what you want without having to click on a single result (much like how certain search queries on Google will return you an instant answer).