Client-server based software that talks to Digitrax LocoNet.
TCP server talks through a hardware interface (e.g. LocoBuffer) to LocoNet.
(User interface) clients talk to that server.
Pangaea will be a robust and feature filled game engine built using Allegro (http://alleg.sourceforge.net) It will be similar to Final Fantasy 1-3, etc., complete with map editor/world builder.