The Mac calendaring app Fantastical 2 ($39.99) is fast, highly customizable, and responsive. It pulls in calendar appointments from other sources, such as iCloud and Google, and keeps them all tidy.
![Outlook Outlook](/uploads/1/2/4/2/124257031/793731727.jpg)
Power at your fingertips Fantastical supports availability and scheduling, allowing you to quickly find out if coworkers are available when creating a new event. Scheduling requires a supported server, such as Google Apps or Exchange. ICloud does not support availability. Other Exchange features such as categories, attachments, invitation response and cancellation messages, invitation forwarding, and accepting or declining an invitation without sending a response are fully supported. Fantastical also is full of other conveniences, such as push updates for Google, Exchange, and Office 365, response messages for Google, Google Hangouts links, printing, and undo and redo support, just to name a few.