CONVERTCP - CONVERTCP is a command line utility to convert text file encoding.
GNU M4 - GNU M4 is an implementation of the m4 macro preprocessor.
ConvertZ - ConvertZ is a program to convert Chinese/Japanese codes.
XMLStarlet - XMLStarlet Command Line XML Toolkit
CpConverter - Code Page Converter - Convert HTML/Text files to different encoding formats e.g.
xmllint - command line XML tool