Yes! Check out http://duckduckhack.com/ -- it is our open source instant answer platform, which is becoming more and more of DuckDuckGo. The whole platform is open source itself (in addition to the answers).
We've been actually open sourcing more and more because what I meant is that as DuckDuckHack grows it is becoming more and more of the search engine. Check out https://github.com/duckduckgo -- bunch of new repos since 2013.