Higher-order programming

• function - Function object wrappers for deferred calls or callbacks, from Doug Gregor.
• bind
• functional - Enhanced function object adaptors, from Mark Rodgers.
• compose - Functional composition adapters for the STL, from Nicolai Josuttis.

Extension data structures

• any - Safe, generic container for single values of different value types, from Kevlin Henney.
• tuple - Ease definition of functions returning multiple values, and more, from Jaakko Järvi.
• compressed_pair - Empty member optimization, from John Maddock, Howard Hinnant, et al.

Memory

• pool - Memory pool management, from Steve Cleary.
• smart_ptr - Four smart pointer classes, from Greg Colvin and Beman Dawes.
• utility - checked_delete and checked_array_delete function templates, from Beman Dawes and others.

String and text processing

regex - Regular expression library, from John Maddock.
tokenizer - Break of a string or other character sequence into a series of tokens, from John Bandela.
• conversion/lexical_cast - lexical_cast class template, from Kevlin Henney.

STL components

Containers

• array - STL compliant container wrapper for arrays of constant size, from Nicolai Josuttis.
• graph - Generic graph components and algorithms, from Jeremy Siek and a University of Notre Dame team.

Algorithms

• graph - Generic graph components and algorithms, from Jeremy Siek and a University of Notre Dame team.
• utility - next and prior function templates, from Dave Abrahams.

Iterators

• iterator adaptors - Adapt a base type into a standard conforming iterator, and more, from Dave Abrahams, Jeremy Siek, and John Potter.
• operators - Templates ease arithmetic classes and iterators, from Dave Abrahams and Jeremy Siek.
• graph - Generic graph components and algorithms, from Jeremy Siek and a University of Notre Dame team.
• tokenizer - Break of a string or other character sequence into a series of tokens, from John Bandela..

Function objects

• functional - Enhanced function object adaptors, from Mark Rodgers.
• compose - Functional composition adapters for the STL, from Nicolai Josuttis.
• bind

Generic programming utilities

• concept check - Tools for generic programming, from Jeremy Siek.
• static_assert - Static assertions (compile time assertions), from John Maddock.
• type_traits - Templates for fundamental properties of types, from John Maddock, Steve Cleary, et al.
• call_traits - Defines types for passing parameters, from John Maddock, Howard Hinnant, et al.
• operators - Templates ease arithmetic classes and iterators, from Dave Abrahams and Jeremy Siek.
• property map - Concepts defining interfaces which map key objects to value objects, from Jeremy Siek.

Template metaprogramming

• type_traits - Templates for fundamental properties of types, from John Maddock, Steve Cleary, et al.
• static_assert - Static assertions (compile time assertions), from John Maddock.

Math and numerics

• integer - Headers to ease dealing with integral types.
• math/octonion - Octonions, from Hubert Holin.
• math/quaterion - Quaterions, from Hubert Holin.
• math/special_functions - Mathematical special functions such as atanh, sinc, and sinhc, from Hubert Holin.
• random - A complete system for random number generation, from Jens Maurer.
• rational - A rational number class, from Paul Moore.
• conversion/numeric_cast - numeric_cast class template, from Kevlin Henney.

Correctness and testing

• concept check - Tools for generic programming, from Jeremy Siek.
• static_assert - Static assertions (compile time assertions), from John Maddock.
• test - Support for program testing and execution, from Beman Dawes.

Inter-language support

• python - Reflects C++ classes and functions into Python, from Dave Abrahams.

Miscellaneous

• crc - Cyclic Redundancy Code, from Daryle Walker.
• timer - Event timer, progress timer, and progress display classes, from Beman Dawes.
• conversion - Numeric, polymorphic, and lexical casts, from Dave Abrahams and Kevlin Henney.
• compressed_pair - Empty member optimization, from John Maddock, Howard Hinnant, et al.
• utility - Class noncopyable plus checked_delete(), checked_array_delete(), next(),  prior(), and tie() function templates, from Dave Abrahams and others.

Broken compiler workarounds

• compatibility - Help for non-conforming standard libraries, from Ralf Grosse-Kunstleve and Jens Maurer.
• config - Helps boost library developers adapt to compiler idiosyncrasies; not intended for library users.