I love Lunarium, a super free lunar calendar and planetary hour calculator. No login, no member’s area, no fee, also a great newsletter (although eratic, but then: who am I to talk?) and above all no more messing around with a calculator and calendar to work out the precise planetary hour, for us mathematically challenged individuals. The site also features articles on astro issues such as void of course and retro movements. For ritual use, it’s my first port of call. And it’s British.