The best free software:
Jagannath Hora
This will get you started and take care of all calculation needs.

The best paid software:
Sri Jyoti Star
This is beneficial for serious students and those who intend to give astrological readings.

Astrodienst is an online program that calculates the chart in the western circle. It also has sidereal options. I use this to check the accuracy of the other programs when there is a difference. Those who don't have Sri Jyoti Star can use this to make charts for astrocartography.

More charts and info
is available at
Astro Databank

Further Courses:

5 Year Jyotish Course
Parashara Jyotish Course

Advanced Jyotish Studies
Jaimini Sutra Course

Associated Astrologers:

Sohamsa (DBC)
Sri Jagannath Center
Sanjay Rath
Visti Larsen
Sarbani Rath
Sarajit Podder

Graduate Resources:

Students who have completed at least level 1 meet on the Sunday closest to full moon.

Graduates Page

Graduate Video Archives