I think tinderboxes are a general accepted taken. Anything that you can create with your mind I think is okay. Guns are up to the levels of revolvers more or less, the traditional old ones that pirates have. Airships are usually described as being like zepplins. It depends who you talk to probably about technology. Recently there have been threads with content about genetic experimenting - e.g. making people stronger with serums and so on. If you add magic to the mix then you can make more things. The main thing I do is consider what the cultures have already, and why they might make things when they have magic etc.

Oh and steam trains are a thing. Between the cities.