Here’s a list of some various astrology tools:
Astro.com – free chart calculations
Astro-Databank – Database of charts
Midpoint Calculator – Find midpoints of 2 planets
Phase Calculator – find the distance between any two planets
Sabian symbols – Sabian symbol look up
Small Body Database – NASA lookup tool
Eclipse Saros series – NASA site
Recommended astrology software – Solar Fire, Kepler, Sirius