Sunrise calendar is being shutdown 31 August. It has some great features like: - Easy OAuth integration with Google, TripIt, Trello, Asana, Todoist, etc. - 'Meet' which allows you to send people a meeting booking link with your realtime availability. - Cross platform, works nicely on desktop, mobile and web.

Fantastical has been suggested, but it doesn't do any of the three things above :( Anyone heard any whispers about a new company filling the gap?

http://blog.sunrise.am/post/144196642739/its-almost-time-to-say-goodbye