Here is some free astrology software I have found very useful. The first one I only just stumbled upon today and I just love it as a research tool for finding aspects and configuration through history.
Free Astrology Software Online
The site is Configuration Hunter and I used it to hunt down a configuration we are beginning to experience right now. Jupiter conjunct Uranus, both opposite Saturn. This free software worked out that the last time this configuration occured was in June and July of 1692. A quick links this configuration to the Salem Witch Trials and hangings, a Mexico City famine and riot, and an earthquake and tsunami in Jamaica.
Serennu Astrology has many great features and is especially useful for finding over 1000 asteroids and other points in your chart. You can also find information on lunations from 1201 – 2399.
Astrodienst (astro.com) is the best free online astrology site. You can store up to 100 charts on their free horoscope maker. They also have a massive free horoscope database at astro databank. The disadvantage of the charts at astro.com is that you can’t enter specific co-ordinates for a location like you can at Serrenu Astrology.
Noend Press has an Arabic Parts Calculator and an individual Midpoint Calculator, but truenode.com will list all your midpoints for you, as well as aspects. All free astrology software, and nothing to download – enjoy.