Language: Typescript.
Frontend Framework: Astrojs [1] or qwik [2]
Frontend Library: React if it requires 3d and other frame-motion like animations, else will not use any frontend library or might throw solidjs if required for some state etc.
Backend: Cloudflare functions, google functions
Auth: Lucia-Auth [3] if required
IDE: VS code with neovim , once deployed to git, I might some time use code-spaces
CSS: DaisyUI [4] with tailwind or Bulma
CSS Library: TailwindUI [5] makes most of the components ready to use and comes from the makers
CMS: Astro content collections or Sanity [6]
Deployment: Cloudflare (Highly preferred) or linode/digitalocean/netlify
Database: turso [7] or neon postgres [8] with (drizzle orm) or cloudflare durable objects
1. https://github.com/withastro/astro
2. https://github.com/BuilderIO/qwik
3. https://github.com/lucia-auth/lucia
4. https://github.com/saadeghi/daisyui
Also huge fan of firebase and their emulators and whole eco-system.