It's an events and calendaring platform that makes it simple to run RSVP-style events either in person or virtual, as well as optional paid or by donation ticketing.
Luma automatically adds events to attendee calendars, as well as reminder emails one day before and one hour before the event.
Events can post updates by email, and you can also send newsletter-style updates to people who are subscribed to entire calendars.
Luma has a freemium model. The paid plan is $69USD per month.
You can embed upcoming events in the wiki