Although Selvos is available from CGI, there is a significant amount of additional information available from the author. This expansion covers the people of the town and the surrounding land.
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.