Martin Janiczek has ported David MacIver’s Minithesis project to Elm. elm-minithesis is a property based testing library similar to the Fuzz module in elm-explorations/test, but with better shrinking strategies.
Justin Rassier has created a PostCSS plugin that will take a Tailwind configuration and generate elm-css functions. It generates helpers for Tailwind utility classes and for media queries. Some things like CSS Grid and CSS Transitions are not supported yet.