Apache Commons Logging is a thin adapter allowing configurable bridging to other,

Apache HttpComponents Client

The application programming interface for the repository system.

SLF4J Reload4j Provider

Guava is a suite of core and expanded libraries that include

Components completing Maven Resolver for utilizing Maven POM and repository metadata.

The effective model builder, with inheritance, profile activation, interpolation, ...

Model for Maven POM (Project Object Model)

Interface and implementation of Maven Artifact model

Per-directory local and remote repository metadata.

Support for descriptor builders (model, setting, toolchains)

Plexus Component Java Annotations, to describe plexus components properties in java sources with

An implementation of the repository system.

A repository connector implementation for repositories using URI-based layouts.

A transport implementation for repositories using file:// URLs.

A transport implementation for repositories using http:// and https:// URLs.

A set of annotations used for code inspection support and code documentation.