Deterministically produce dummy data for use in stubs

Equality assertion for scalatest and scalacheck which outputs a diff of two unequal inputs

Decode/encode the overpunch format

Property-based testing for Scala

Alloy within Kotlin

GPC common types that can be used on any Scala services or libraries

Flexible law checking for Scala

A simple configuration-file-based CLI parser for Scala.

WOOT model for Scala and JavaScript via Scala.js

Additional functionality for ScalaCheck, not part of the core distribution

Scalacheck Instances For Errors4s Core Types

Protocol buffer compiler for Scala.

Some collections I find useful

Property-based testing for Scala

Effectful property testing built on ScalaCheck

fs2 pipes for encrypting and decrypting data using BouncyCastle's PGP implementation

Some Scala utilities

ScalaTest + ScalaCheck provides integration support between ScalaTest and ScalaCheck.

ScalaCheck Gen for joda-time

property based testing library for Scala