What software do you use to manage/aggregate calendars?

[Andrew Wong]

Wondering if anybody here uses some kind of website to track all your calendars and to also share it with other people.

My situation is that most of my stuff comes from AirBnB, but I also have inquiries from Craigslist and my website. I have a few units right now, and it's already making Google Calendar look kind of a mess. 

I'm bringing on a PM type of figure, but not sure yet if i want them to have access to the AirBnB account, so I'm looking for a solution to be able to handle some calendar/reservation system with another software that can sync with AirBnB or to block off the calendar.

Thanks