This software site repository URL,
http://download.eclipse.org/releases/neon/
provides access to the software repository for the Eclipse Neon release.

This repository site URL is typically pre-populated in the list of software repositories when you install the Eclipse Platform or SDK.

For more information about installing or updating software, see the Eclipse Platform Help.

There is also a collection of handy, downloadable all-in-one packages available for many interests and platforms. Many people find these all-in-one packages the easiest way to get started.

NOTE: Due to structural changes you cannot update from a Mars (or prior) all-in-one package to a Neon version. If interested in the technical details, see bug 332989 and bug 490515.