Hello World
   Simple example of YAFL program.
   http://www.ntecs.de/old-hp/uu9r/lang/html/yafl.en.html#_Hello%20World

The YAFL Programming Language
   Mid-term research project to design, implement an object-oriented language, and several attached tools; major goals: be strict language with inheritance and garbage collector, unique compiler support facility. [Open Source, GPL]
   http://www.phidani.be/yafl/