ns-3.14 was released on 5 June 2012. This release contains several new features and many bugs fixed.

A hotfix release, ns-3.14.1, was made on 6 June 2012 to fix a bug related to running the PyViz visualizer.

The latest ns-3.14.1 source code can be downloaded from here while the extensive documentation is available in a variety of formats from here.