A better build tool for Java, Scala and Kotlin: Simpler than Maven, easier than Gradle, with 3-6x faster dev workflows than other JVM build tools

Simple, expressive, and safe UI library for Scala.js

Scala macros for compile-time generation of safe and ultra-fast JSON codecs + circe booster

Simple & Efficient data access for Scala and Scala.js

Describe HTTP endpoints in Scala and derive clients, servers, and documentation

Elm-inspired Scala UI library.

https://disneystreaming.github.io/smithy4s/

property based testing library for Scala

Using the latest technology in the Scala ecosystem, Boilerplay is a reactive web application built on Play Framework, ScalaJS, Silhouette, Sangria/GraphQL, and PostgreSQL. It provides a good starting point for whatever you want to build.

State propagation and event streams with mandatory ownership and no glitches

Cross-platform compilation support for sbt.

Typescript to Scala.js converter

A GitHub API wrapper written in Scala

Next generation user interface and application development in Scala and Scala.js for web, mobile, and desktop.

experimental CPS transformer for dotty

RTree2D is a 2D immutable R-tree for ultra-fast nearest and intersection queries in plane and spherical coordinates

Scala FP configuration library with a focus on runtime clarity

Pure, reactive UI library for Scala.js

Scala configuration library supporting HOCON for Scala, Java, Scala.js, and Scala Native