The International Components for Unicode (ICU) is a C and C++ library that 
provides robust and full-featured Unicode support on a wide variety of 
platforms. The library provides:

  Calendar support
  Character set conversions
  Collation (language-sensitive)
  Date & time formatting
  Locales (140+ supported)
  Message catalogs (resources) 
  Message formatting 
  Normalization 
  Number & currency
  formatting
  Time zones
  Transliteration
  Word, line & sentence
  breaks

WWW: http://oss.software.ibm.com/developerworks/opensource/icu/project/index.html