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
The Spirit repository is a community effort collecting different reusable components (primitives, directives, grammars, etc.) for Spirit.Qi parsers and Spirit.Karma generators. All components in the repository have been peer reviewed or discussed on the Spirit General List. For more information about the repository see here.