Poll: What database does your company use?
BDB shout-out.  It's fast, efficient, and very minimalist in it's featureset.<p>For many use-cases, a full database isn't needed.  And 5~10 years ago, "NoSQL" databases didn't exist: You just used a BDB as your key-value store.<p>It's not new and sexy, but it backs a lot of things.