Perl module for mapping character set names to IANA names

 I18N::Charset maps Character Set names to the names officially
 registered with IANA. For example, 'Shift_JIS' is the official name
 of 'x-sjis'.
 .
 It also maps character set names to Unicode::Map, Unicode::Map8, and
 Unicode::MapUTF8 conversion scheme names (if those modules are
 installed). For example, the Unicode::Map8 scheme name for
 'windows-1251' is 'cp1251'.