Qt - Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.
ConvertZ - ConvertZ is a program to convert Chinese/Japanese codes.
GTK - GTK+ is a multi-platform toolkit for creating graphical user interfaces.
CONVERTCP - CONVERTCP is a command line utility to convert text file encoding.
wxWidgets - wxWidgets: Cross-Platform GUI Library
Batch Encoding Converter - Convert files between more than 100 text encodings and binary formats!