Privacy-centric search engine, with absolutely no tracking, which uses Bing in the background. "Zero-click" functionality is unsurpassed and ability to heavily customize the appearance as well as use it in no-frills "Lite" mode, make it a great alternative to Google. Unfortunately no image search yet, but it can pass the query to Google, using the "!images" tag.
A great alternative to the big brother roving eye invaders of privacy at Google.
Since I have a Google phone (G2X) - where the Google browser takes 10 minutes to open - I even put DuckDuckGo on my phone. EVER so much better.
The are adhering to Google's motto: Don't Be Evil - since Google isn't using their motto anymore.
My preferred search engine - orders of magnitude more relevant than Google. Perpetual scrolling (do Google search users ever go past page 1?) and has bangs! If you really need the Google spider use it in StartPage (my second favorite search engine) instead.
A great forward thinking alternative to the heavy-weight search engines which dominate the market. The "Zero-Click" feature which display relevant information and answers to questions (e.g. timezone conversions) is more reliable and extensive than other providers such as Google.