I used DDG as the primary search engine in the past and relied a lot on bangs (!s, !g). I'm currently trying the new search from Cliqz (https://beta.cliqz.com), which is similar as it also supports some of the bangs, but I find the search results better than DDG, especially for German searches. It is still work in progress though. Spell correction, for example, is not good yet in cliqz.