Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.
Superpowered - Power through the day without your calendar
BusyCal - powerful calendar app for macOS
InstaCal - The missing menu bar calendar for MacOS
Google Calendar - Spend less time managing your day & more time enjoying it
Productivity Power Tools - Extension for Visual Studio - A set of extensions to Visual Studio 2012 Professional (and above) which improves developer productivity.