The Apache Commons Collections package contains types that extend and augment the Java Collections Framework.

Jakarta Dependency Injection

Mule server and core classes

Mule Builder for use with Spring 4.3.x Namespace based XML configuration.

A Mule transport for Http Connectivity. This transport supplies a simple Http Server implementation.

Basic building block for Spring that in conjunction with Spring Beans provides dependency injection and IoC features.

QDox is a high speed, small footprint parser for extracting class/interface/method definitions from source files

OSGi Core Release 6, Interfaces and Classes for use in compiling bundles.

JUnit Jupiter is the API for writing tests using JUnit 5.

Mockito mock objects library core API and implementation