Astrology can be a profound guide, on its own terms, in achieving greater self-knowledge and to living life, and is deeply appreciated as such by many.
These sites are all excellent resources for personal astrology, with birth chart facilities and extensive articles and references.
Solar Fire is the leading astrology software for Windows.
Solar Fire has been developed into the the excellent Astro Gold which works is available on all devices and operating systems.
If you would like to add any sites or software to this list, please get in touch.