I have written something to help build web apps faster - but it's not really a framework it's kind of like "WordPress for web apps". WordPress provides an interface for users and a CMS so you focus on your blog posts.

With my software all the user accounts, organizations, subscriptions, a complete Stripe Connect platform, all the stuff that accompanies a web app or SaaS is ready for your web app, which you can write in any stack and it's going to be much smaller without those things.

https://userdashboard.github.io