Hepek 
The main theme of Hepek projects is typesafe but flexible HTML.
See these posts for motivation:
Projects:
Hepek Components 
Typesafe templates, grids, forms, code highlighting, markdown etc.
JVM and ScalaJS supported!
Support for custom attributes:
Hepek SSG 
Static site generator for developers.
Make your own website and deploy it with Netlify (yes, for free) in just a few clicks:
Resources:
- documentation
- starter template
- examples
- source code of sake.ba
- source code of blog.sake.ba (code examples, math snippets etc.)
Integrations
Sharaf
Shraf integration.
Hepek Play 
Play framework integration.
Hepek Http4s 
Http4s integration.
Hepek ZIO 
ZIO integration.