A static site generator (similar to hugo et al.) whose sites can be built in any of the big web frameworks (react, vue, angular, svelte, or -- they claim -- any other for that matter).

It also boils everything down to plain html but let's you embed javascript components if you wish,
and those components will only be loaded if the user actually scolls to them ('island design').

Sounds very promising, currently in early beta.

SImple blog tutorial here:
https://www.rockyourcode.com/build-faster-websites-with-less-javascript-using-astro-tutorial/

Small (10kb gzip) css framework.

Describing itself as invasive, i.e. hard to drop into an existing project - but very easy to integrate into new ones.
Looks fun and light-weight.

Graceful & Minimal CSS design system in pure semantic HTML - picocss/pico

Minimal frontend framework for javascript

Fast, simple, and enough for simple portfolio etc websites?

In this post, we’ll set up a demo site and tutorial for headless WordPress, including a starter template! We’ll use the WordPress dashboard for rich content editing, while migrating the front-end architecture to the JAMstack.

This is a scope of the most interesting and the most popular GitHub JS repositories from June 2018.