Some useful links:

AstroDeinst world atlas lookup:

Information on the Systems Approach:

http://www.iipa.net International Institute of Predictive Astrology.
http://www.yournetastrologer.comProf. V.K. Choudhry's web site.

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>