On the Oracle Tech Network, a nice reminder of the still-"new"-to-some hash-based containers, co-authored by the chair of the U.S. C++ standards committee:

Understanding the New Set and Map Containers in the C++11 Standard Library

by Steve Clamage and Darryl Gove

From the article:

One of the areas in the new C++ standard that has seen the most enhancement is the Standard Library. The functionality that is most likely to be immediately useful to developers is the additions to the container classes. This article describes the new set and map containers.