com-lihaoyi

Mill is a build tool for Java, Scala and Kotlin: 3-6x faster than Maven or Gradle, less fiddling with plugins, and more easily explorable in your IDE

Cask: a Scala HTTP micro-framework. Cask makes it easy to set up a website, backend server, or REST API using Scala

Acyclic is a Scala compiler plugin to let you prohibit circular dependencies between files

Scala ORM to query SQL databases from Scala via concise, type-safe, and familiar case classes and collection operations. Connects to Postgres, MySql, H2, and Sqlite out of the box

Provides the geny.Generator data type, the dual to a scala.Iterator that can ensure resource cleanup