[jordanlev]

There are lots out there, but the terminology is not consistent so it's hard to identify them.

Perhaps one of these would serve your needs:

https://strapi.io

https://getcockpit.com

[pippy]

And to add to your list: SilverStripe framework 4.0. Their PaaS solution is pretty pricey, but it's opensource so you can run it yourself.

Their software ecosystem is mature as well, as they've been around for a while.