The Harnic Astrology program takes a fully functional and richly detailed Earth-based Astrology Program ("SymSolon") (GNU) and changes the parameters to produce output appropriate for the Harnic Isles and the planet (solar system) of Kethira.
This 'double' issue includes 24 characters to be used in any way the GM sees fit; as NPC opponents, helpers or even emergency PCs for that player who turns up unexpectedly.