Libraries Listed by Category

Format - Type-safe 'printf-like' format operations, from Samuel Krempp.
Regex - Regular expression library, from John Maddock.
String Algorithms - A set of generic string-related algorithms and utilities , from Pavol Droba.
Tokenizer - Break of a string or other character sequence into a series of tokens, from John Bandela.

Array - STL compliant container wrapper for arrays of constant size, from Nicolai Josuttis.
Dynamic Bitset - A runtime sized version of std::bitset, from Jeremy Siek and Chuck Allison.
Graph - Generic graph components and algorithms, from Jeremy Siek and University of Notre Dame Team.
Multi Array - Multidimensional containers and adaptors for arrays of contiguous data, from Ron Garcia.
Property Map - Concepts defining interfaces which map key objects to value objects, from Jeremy Siek.
Variant - Safe, generic, stack-based discriminated union container, from Eric Friedman and Itay Maman.

Graph - Generic graph components and algorithms, from Jeremy Siek and University of Notre Dame Team.
Iterator Adaptors - Adapt a base type into a standard conforming iterator, from Dave Abrahams, Jeremy Siek, and John Potter.
Operators - Templates ease arithmetic classes and iterators, from Dave Abrahams and Jeremy Siek.
Tokenizer - Break of a string or other character sequence into a series of tokens, from John Bandela.

Graph - Generic graph components and algorithms, from Jeremy Siek and University of Notre Dame Team.
Utility - Class noncopyable plus checked_delete, checked_array_delete, next, prior function templates, plus base-from-member idiom, from Dave Abrahams and others .

Bind - Generalized binders for function/object/pointers and member functions, from Peter Dimov.
Boost.Functional/Hash - A TR1 hash function object that can be extended to hash user defined types , from Daniel James.
Compose - Functional composition adapters for the STL, from Nicolai Josuttis.
Function - Function object wrappers for deferred calls or callbacks, from Douglas Gregor.
Functional - Enhanced function object adaptors, from Mark Rodgers.
Lambda - Define small unnamed function objects at the actual call site, and more, from Jaakko Järvi.
Mem_fn - Generalized binders for member functions, from Peter Dimov.
Ref - A utility library for passing references to generic functions, from Jaakko Järvi, Peter Dimov, Douglas Gregor, and Dave Abrahams.
Signals - Managed signals & slots callback implementation, from Douglas Gregor.

Boost.StaticAssert - Compile time diagnostics library , from John Maddock and Steve Cleary.
Boost.TypeTraits - Meta-programming support library , from various authors.
Call Traits - Defines types for passing parameters, from John Maddock and Howard Hinnant.
Concept Check - Tools for generic programming, from Jeremy Siek.
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.

MPL - Template metaprogramming framework of compile-time algorithms, sequences and metafunction classes, from Aleksey Gurtovoy.

Preprocessor - Preprocessor metaprogramming tools including repetition and recursion, from Vesa Karvonen and Paul Mensonides.

Integer - Headers to ease dealing with integral types, from various authors.
Interval - Extends the usual arithmetic functions to mathematical intervals, from Guillaume Melquiond, Hervé Brönnimann, and Sylvain Pion.
Math - Several contributions in the domain of mathematics, from various authors.
Math/Common Factor - Greatest common divisor and least common multiple, from Daryle Walker.
Math/Octonion - Octonions, from Hubert Holin.
Math/Quaternion - Quaternions, from Hubert Holin.
Math/Special Functions - Mathematical special functions such as atanh, sinc, and sinhc, from Hubert Holin.
Multi Array - Multidimensional containers and adaptors for arrays of contiguous data, from Ron Garcia.
Operators - Templates ease arithmetic classes and iterators, from Dave Abrahams and Jeremy Siek.
Random - A complete system for random number generation, from Jens Maurer.
Rational - A rational number class, from Paul Moore.
uBLAS - Basic linear algebra for dense, packed and sparse matrices, from Joerg Walter and Mathias Koch.

Concept Check - Tools for generic programming, from Jeremy Siek.
Test - Support for simple program testing, full unit testing, and for program execution monitoring, from Gennadiy Rozental.

Any - Safe, generic container for single values of different value types , from Kevlin Henney.
Compressed Pair - Empty member optimization, from John Maddock and Howard Hinnant.
Optional - Discriminated-union wrapper for optional values, from Fernando Cacciola.
Program_options - Facilities to obtain configuration data from command line, config files and other sources, from Vladimir Prus.
Tuple - Ease definition of functions returning multiple values, and more, from Jaakko Järvi.
Variant - Safe, generic, stack-based discriminated union container, from Eric Friedman and Itay Maman.

Format - Type-safe 'printf-like' format operations, from Samuel Krempp.
I/O State Savers - Save I/O state to prevent jumbled data, from Daryle Walker.
Serialization - Serialization of C++ objects for persistence and marshalling, from Robert Ramey.

Pool - Memory pool management, from Steve Cleary.
Smart Pointer - Five smart pointer class templates, from Greg Colvin, Beman Dawes, Peter Dimov, and Darin Adler.
Utility - Class noncopyable plus checked_delete, checked_array_delete, next, prior function templates, plus base-from-member idiom, from Dave Abrahams and others .

Spirit - LL parser framework represents parsers directly as EBNF grammars in inlined C++, from Joel de Guzman and team .

CRC - Cyclic Redundancy Code, from Daryle Walker.
Compressed Pair - Empty member optimization, from John Maddock and Howard Hinnant.
Conversion - Numeric, polymorphic, and lexical casts, from Dave Abrahams and Kevlin Henney.
Date Time - A set of facilities to ease programming with dates and times. , from Jeff Garland.
Filesystem - Portable paths, iteration over directories, and other useful filesystem operations, from Beman Dawes.
Optional - Discriminated-union wrapper for optional values, from Fernando Cacciola.
Timer - Event timer, progress timer, and progress display classes, from Beman Dawes.
Tribool - Three-state boolean type, from Douglas Gregor.
Utility - Class noncopyable plus checked_delete, checked_array_delete, next, prior function templates, plus base-from-member idiom, from Dave Abrahams and others .

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, from John Maddock, Beman Dawes, and Vesa Karvonen.