[Freak_NL]

    !ud → Urban Dictionary (what do you mean, she's 'office cute'?)
    !wen → Wikipedia English
    !w.. → Wikipedia (two letter language code, e.g., 'nl')
    !wikt Wiktionary

So many useful bangs.

[the_duke]

So many bangs for you duck!

[pvdebbe]

The best bang for your duck

[fenwick67]

Just a plain !w gives me English Wikipedia.

Usually if I need a certain engine I just guess the bang and it's usually supported and correct. !gm for google maps, !tineye for tineye, !wayback for the wayback machine...

[Freak_NL]

They are pretty predictable. I just tried !osm madagascar on a whim, and it opens OpenStreetMap, as expected.

Setting DuckDuckGo as the search engine for your browser's address bar means all these bangs work right there whenever you open a new tab.

[smnrchrds]

It depends on language settings. I have set DDG region to Canada and language to Canadian French. As a result, !w redirects mne to French Wikipedia.

[qweqweqweqw]

I, too, switched to DDG, but sadly my most used bang is !g because in 1/3 cases DDG doesn't find what I am looking for.

[chuckledog]

Does DDG learn from what people !g for?

[l1feh4ck]

I would place my bet on that. That would be a query they need to work on.

[SeanDav]

I would sincerely hope not! i.e. Tracking.

[dredmorbius]

If that information isn't personalised in any fashion and the data are retained for a minimum period, I'd be OK with sorting out what types of queries aren't satisfied on DDG itself.

[dredmorbius]

    !hn does something or another

[0x4a42]

Some might be less useful tho, try:

!ddg google

Or if you are feeling lucky:

!!ddg google

:)

edit: typo