Although this is technically not a plugin, this is a bunch of tools that all of the plugins use. This is very useful for ...

The API for Maven 3 plugins - Mojos - development.

Model for Maven POM (Project Object Model)

Provides utility methods for creating JARs and other archive files from a Maven project.

Interface and implementation of Maven Artifact model

Doxia Sink API.

The Decoration Model handles the decoration descriptor for sites, also known as site.xml.

The Site Renderer handles the rendering of sites, merging site model with document content.

API to manage report generation.

Abstract classes to manage report generation.

API to manage report generation.

A collection of ready-made filters to control inclusion/exclusion of artifacts during dependency resolution.

A component to programmatically invoke Maven.

A collection of various utility classes to ease working with strings, files, command lines and

Rhino JavaScript runtime jar, excludes XML, tools, and ScriptEngine wrapper

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