JUnit is a unit testing framework for Java, created by Erich Gamma and Kent Beck.
Last Release on Dec 4, 2014
Standard library for the Scala Programming Language
Last Release on Aug 28, 2018
Guava is a suite of core and expanded libraries that include utility classes, google's collections, io classes, and much much more.
Last Release on Aug 1, 2018
The Support Library is a static library that you can add to your Android application in order to use APIs that are either not available for older platform versions or utility APIs that aren't a part of the framework APIs. Compatible on devices running API 14 or later.
Last Release on Sep 22, 2018
The Apache Commons IO library contains utility classes, stream implementations, file filters, file comparators, endian transformation classes, and much more.
Last Release on Oct 15, 2017
Mockito mock objects library core API and implementation
Last Release on Oct 5, 2018
Last Release on Feb 11, 2018
Clojure core environment and runtime library.
Last Release on Oct 11, 2018