A simple testing framework for Scala
Writing Fast Parsers Fast in Scala
Acyclic is a Scala compiler plugin to let you prohibit circular dependencies between files
uPickle: a simple, fast, dependency-free JSON serialization library for Scala
ScalaTags is a small XML/HTML construction library for Scala.
Scala library providing "source" metadata to your program, similar to Python's __name__, C++'s __LINE__ or Ruby's __FILE__.
Macros for simple/safe RPCs between Scala applications, including ScalaJS/ScalaJVM
Scala/Scala.js library for manipulating Fancy Ansi colored strings
Programmable, Typesafe Document Generation
Pretty-printing value, types and type-signatures in Scala
Provides the geny.Generator data type, the dual to a scala.Iterator that can ensure resource cleanup
An experimental library for Functional Reactive Programming in Scala
Cask: a Scala HTTP micro-framework
Your shiny new Java/Scala build tool!
Tooling around scala-js