Astrology Ephemeris: Centaurs, TNOs, Asteroids & Planets from Serennu Astrology.
Arabic Parts Generator
An online calculator for Arabic Parts, numerical relationships between points in the chart.
Planetary Aspect Hunter
Configuration or planetary aspect calculator for specific time periods.
Calculate the astrological "near" and "far" midpoints between two planets, with this online resource.
Free Birth Charts Online
Here are three astrology sites that offer free birth charts with insightful interpretations.