JyotishTools.com

Some useful links:

AstroDeinst world atlas lookup:
http://www.astro.com

Information on the Systems Approach:
http://www.iipa.net

International Institute of Predictive Astrology:
http://www.yournetastrologer.com

Astro-Databank Wiki Project: Large collection of astrological data collected by Lois Rodden and contributors.
http://www.astro.com/astro-databank/

Hank Friedman’s Astrology Software Site Reviews and guides to using astrology software including Jyotish Tools products.
http://www.soulhealing.com/astrosof.htm
http://www.soulhealing.com/tutorials.htm