Since I don't see it mentioned here and it's complimentary information allow me to mention the OpenAPI Tools website[0]. It lists and categorizes a ton of different tooling options from SDK generators, to automatic testing frameworks, etc. From some personal experience they vary in spec support and quality widely, but the listing itself is a good starting point if you're in a position to start evaluating tooling for a team you're on or company you're working with.
I actually looked at that one, too, and know the person (or one of the people) that started it. Their classification is better than tools.openapis.org (slightly embarrassing, but we don't have anyone who has volunteered to curate it beyond minimal PR approvals, so...). Although you still fundamentally see the same problems. And it was more convenient for me to point to the messier list for the purpose of this blog post, anyway!
[0] https://openapi.tools/