For want of a neutral definition of "steampunk," I turned to Wikipedia, which states: "Steampunk is a sub-genre of science fiction that typically features steam-powered machinery, especially in a setting inspired by industrialized Western civilization during the 19th century."
Now, a lot of folks have told me that The Daedalus Incident has a very steampunk feel. A touch surprising since the book is set in both the 18th and 22nd centuries, and nothing is being run by steam-powered machinery. Yes, there's cool ships and anachronistic tech, and the English – and the damnable French – but the engine of the setting's tech is alchemy, not steam.
I think there's a lot more to steampunk than steam, or the 19th century for that matter. So while Daedalus and its upcoming sequel The Enceladus Crisis aren't strictly steampunk, I'm certainly borrowing from the spirit of the genre.
To me, the following list is what steampunk looks like when you take away the steam. (If you disagree, all I ask is that you do so kindly. And blame Sean – he picked the topic!)