Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Chapter 1. Boost.Core

The Boost.Core library is a collection of core utilities. The criteria for inclusion is that the utility component be:

simple,
used by other Boost libraries, and
not dependent on any other Boost modules except Core itself, Config, Assert, StaticAssert, or ThrowException.