I make Nodewood: https://nodewood.com/

It's a SaaS starter kit/boilerplate written in Node.js and Vue 3. Made almost _exactly_ $500/month last year. Would have/should have made more with proper marketing, but I've been doing probably too much engineering instead. The next release should be the one to take it out of "beta" (honestly, an arbitrarily-chosen label, especially compared to some competitors with fewer features/work put into them), and then it'll be a bit easier to work with some potential partners who would prefer to promote non-beta software.