I am working on Dwata, a (planned to be) power admin that is language/framework agnostic. Works with SQL and third party APIs (Stripe, Mailchimp, etc.) and has tons of team collaboration features, things that I have seen repeatedly in my 14 years/10 startups experience.

Self-hosted and open source, but I surely want to make a living off this.

https://github.com/brainless/dwata/tree/develop

I am working on this full-time, daily. The README is a bit out of date.