This package lets you use features of the DuckDuckGo search engine from inside Emacs.
duckduckgo command (in duckduckgo.el) performs search using DuckDuckGo.
The command supports completion of bangs, so you can type part of a website name, press TAB, and enter the rest of your query to perform search on a particular service.
duckduckgo-bang-make-command is a convenient function which defines a wrapper command for a bang.
For example, (duckduckgo-bang-make-command "!hoogle" :name hoogle-remote) defines a command named hoogle-remote which runs Hoogle.
It is also an interactive function.
duckduckgo-answer command (in duckduckgo-answer.el) retrieves information on a topic using Instant Answer API and displays the result in a buffer.