The Boost.Function library contains a family of class templates that are function object wrappers.

A new infrastructure for generic algorithms that builds on top of the new iterator concepts.

Library for working with tuples, including various containers, algorithms, etc.

Safe, generic, stack-based discriminated union container.

Portable C++ multi-threading. C++03, C++11, C++14, C++17.

The Boost Multi-index Containers Library provides a class template named multi_index_container which enables the construction of containers maintaining one or more indices with different sorting and access semantics.