Generic programming for Scala
command line options parsing for Scala
simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module
Practical logging framework that doesn't require any other logging framework and can be completely configured programmatically.
Spire's macros for zero-cost operator enrichment
Binary serialization library for efficient network communication
The super light testing library for Scala and Scala.js
Provides immutable datatypes for working with bits and bytes
Pretty-printing value, types and type-signatures in Scala
Automatic argonaut codec derivation with shapeless
The first and only true Functional Reactive Programming framework for Scala.
Modify deeply nested case class fields
an implementation of Wadler's a prettier printer
Tiny scala-js compatible base64 encoder/decoder written in idiomatic scala. Available on Maven central.
typeclass based functional msgpack serializer/deserializer for Scala. support scala.js and scala-native / msgpack.org[Scala]
A Typesafe-logging (and slf4j) compatible logging library based on macros for Scala/JVM, Scala.js, and Scala Native
Tiny lenses library with focus on ease of use.
Performance focused interpolation
Power assertions (as known from Groovy and Spock) for the Scala language.
Functional HTML5 and XML library for the Scala platform