Spock is a testing and specification framework for Java and Groovy applications. What makes it stand out from the crowd is its beautiful and highly expressive specification language.

Core classes for Specs2, a library for writing executable software specifications in Scala

XMLUnit for Java

'Flexible' or 'fluent' assertions for testing

Core of FluentLenium

Specsy Core

Probably is a testing library designed to unintrusively provide test recording and reporting capabilities to any codebase, regardless of the users’ choices of libraries or programming paradigms.

Tracera Autotest core (HTTP, flush, Env, steps) for JVM

Java Functional Testing Framework Core

A BDD / Testing framework with pure Groovy DSL, running in a Spark cluster, advanced reporting and clearly define the boundary between BA Tester / developer