Here's a couple of things that I include in my go-to stack:
Commitlint: helps you and your team adhere to a commit convention, by checking checks if your commit messages meet the conventional commit format
Prettier: only thing better than looking at beautiful code is not having to worry about formatting it
NextJS: can't believe I put off working on NextJS for so long; it is an absolute delight!
Styled components: CSS-in-JS just works
TypeScript: type-safe code means that refactoring and catching bugs at code-write time itself becomes the norm
Redux Toolkit: an opinionated toolset for much more efficient redux development
and here's a couple of packages that I've been keeping an eye out for:
Rome: an approach to "Standardizing the web development experience" by consolidating a linter, compiler, bundler, and more for JavaScript, TypeScript, HTML, Markdown, and CSS.
Snowpack: modern, lightweight toolchain for web application development with support for O(1) Build Tooling
ParcelJS: a blazing fast app bundler