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!
Used by Hepek SSG and Hepek Play.
Hepek SSG 
Static site generator for developers.
Make your own website and deploy it with Netlify (yes, for free) in just a few clicks:
- starter template
- examples
- source code of sake.ba
Hepek Play 
Play framework integration.