N4JS has become an Eclipse project. The new website can be found at https://www.eclipse.org/n4js/
The new source repository is still hosted at GitHub, but now at https://github.com/eclipse/n4js
Copyright (c) 2017 NumberFour AG.
All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse Public License v1.0 which accompanies this distribution, and is available at http://www.eclipse.org/legal/epl-v10.html