Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
GNU M4 - GNU M4 is an implementation of the m4 macro preprocessor.
Rust - A safe, concurrent, practical language
Gema - General purpose text macro processor.
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible
XMLStarlet - XMLStarlet Command Line XML Toolkit