Nexus is a powerful and robust Maven repository
manager created to provide reliable access to
artifacts required for development and
provisioning. Maven's central repository has
always served as a great convenience for users of
Maven, but it has always been recommended to
maintain your own repositories to ensure stability
within your organization. Nexus greatly simplifies
the maintenance of your own internal repositories
and access to external repositories. You can
completely control access to, and deployment of,
every artifact in your organization from a single
location.