I have been using the astrodienst site (astro.com) for many years and find it to be user friendly and quite extensive in different systems of charting. I always use the equal house system for it makes things easier to understand.Once you log in to the site, you can save as many charts as you wish for future use. Just go to the option where it says extended chart selection and chart away! Let me know if you need any assistance 🙂