These FREE Web sites are among my favorites:

noeltyl.com is a monumental astrology site authored by Noel Tyl.  Three columns updated monthly (Analytical Techniques, Counseling Insights, and Notebook) and an active wide-ranging open Discussion Forum in which Noel frequently contributes his professional insight from his vast experience.  Also contains information about Noel's astrology courses.

Denise Sutorius is an extremely gifted astrologer and a highest-honors graduate of Noel Tyl's Master's Course.

StarIQ.com is a refreshingly unique astrology site that offers free personalized forecasts by email, original daily content on astrology and sports, health, celebrities, finance and other subjects, as well as a guide to astrology conferences, organizations and practitioners worldwide.  

The Astrology Matrix is an on-line interactive astrology reports (real-time astrology/oracles), Astro*Index (Online encyclopedia), online astrology bibliography, real-time search for charts from 20,000 celebrity charts, and more.  By the Win*Star Software people.

Astrodatabank is great place to learn astrology. Lois Rodden's followers post the chart and biography of someone in the news every other week. Astrologers around the world write in to comment on the chart. A research study is featured on alternate weeks. A must-have on your favorite site links.