Portable move semantics for C++03 and C++11 compilers.

A value-semantic, type-safe wrapper for representing 'optional' (or 'nullable') objects of a given type. An optional object may or may not contain a value of the underlying type.

Smart pointer class templates.

Intrusive containers and algorithms.

Standard library containers and extensions.

Safe, generic, stack-based discriminated union container.

LL parser framework represents parsers directly as EBNF grammars in inlined C++.

Serialization for persistence and marshalling.

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

Useful time utilities. C++11.

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.