Chiron Astrology
   Research and writings about Chiron, by Martin Lass. Book excerpts, library and biography.
   http://martinlass.com/chiron.htm

Magi Society
   Advocates the use of planetary geometry, declinations and chiron. Articles, lessons, software and FAQ.
   http://www.magiastrology.com/

The Astrology of The Centaurs
   Wide selection of essays and astronomical data on the astrological centaurs, much of which is available also in Spanish. Home also of the freeware calculation program Riyal.
   http://www.expreso.co.cr/centaurs/

The Centaur Research Project
   Ephemerides, mythological information, research material and news.
   http://www.robertvonheeren.de

Treehouse Mountain
   Asteroid ephemerides, keywords and lessons, with book list and archives.
   http://www.treehousemountain.com/index.htm