uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala
Purely functional JSON parser and library in scala.
simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module
Simple, fast, transparent generic derivation for typeclasses
Scala library providing "source" metadata to your program, similar to Python's __name__, C++'s __LINE__ or Ruby's __FILE__.
A simple testing framework for Scala
OS-Lib is a simple, flexible, high-performance Scala interface to common OS filesystem and subprocess APIs
Productivity-oriented collection of lightweight fancy stuff for Scala toolchain
Binary serialization library for efficient network communication
Functional Configurations for Scala
Flexible law checking for Scala
Use the world of Python from the comfort of Scala!
Practical logging framework that doesn't require any other logging framework and can be completely configured programmatically.
property based testing library for Scala
Type-level & seamless command-line argument parsing for Scala
Spire's macros for zero-cost operator enrichment
Scala/Scala.js library for manipulating Fancy Ansi colored strings
The super light testing library for Scala and Scala.js
Scala testing library with actionable errors and extensible APIs