I have found a lot of great content available in Libby and Hoopla. I use my local library card, but am also able to get a card from a nearby larger city library, and between the two I have access to a lot of content and very soon in a lot of cases.

Libro.fm is basically bookshop.org but for audiobooks. Supports local bookshops, has roughly the same 1 credit per month price.

There are some audible-only titles, which is frustrating.