Asterisk provides a simple and efficient tool for working with Natal charts. This version draws a natal chart with the 10 planets from the Sun to Pluto, the Ascendent and Mid-heaven, as well as Aspects between them.
Asterisk is not a suitable replacement for serious or professional astrologers as it does not provide the necessary tools and functionality that you will need. All that it is trying to do is provide a quick way for you to display a basic natal chart. If you are starting out in astrology and need something with which to draw charts on your computer, then Asterisk could be what you are looking for.
If you’re looking for a serious astrology program then take a look at Solar Fire.
A completely free (if somewhat more complicated to use) program called Astrolog is available here.
The calculations are made using the Moshier system from the Swiss Ephemeris from http://www.astro.com. Houses are calculated using the Placidus house system. The font that is used in the program is a freeware font created by Jason Davies from http://www.widgetsworld.co.uk. If you’re interested in the font, you can grab it from here.