Jonathan Stewart has an open-source tool:
A client wanted to see a feature that I had previously built for another customer. I obviously couldn’t just use real client data. When I used Faker and other tools like that, I got data that looked fine on its own but fell apart when I needed relational integrity such as needing an order to point to a customer which points to an address. AdventureWorks, Contoso, WideWorldImporters and the like are great for what they are, but they are either too small, too clean or not relevant to the demo.
I needed data that would not only look the part for the subject, but also follow relationships, have proper distributions, and so on.
So I built Spindle.
I’ve used Spindle for work purposes. It’s a good product for generating artificial data, either from one of the default data domains (e.g., HR, insurance, health care, manufacturing) or based on an existing database schema.