I run https://www.slickdns.com (DNS hosting) and https://www.youpatch.com (pixel quilt patterns).

Web backend: Django

DNS/Web API backends: Go, Flask, Tornado

DB: Postgres, SQLite

Cache: Redis

Frontend: htmx (via jQuery, Backbone.js and Vue.js)

Marketing site: Cloudflare Pages

Hosting: Mix of Heroku, Linode and Fly

Backups: Backupsy

Dev: Linux and Docker Compose

Payments: Stripe and PayPal (reluctantly)