Apple supplies programming interfaces for text and other international services to help you create applications that are adaptable for worldwide markets.Apple Type Services for Fonts
Apple Type Services for Unicode Imaging
Date, Time, and Measurement Utilities
Dictionary Manager
Font Manager
FontSync
Language Analysis Manager
Locales Utilities
Multilingual Text Engine
QuickDraw Text
Script Manager
Text Encoding Conversion Manager
Text Services Manager
Text Utilities
TextEdit
Unicode Utilities