Microsoft Office Outlook
Commercial
Microsoft Outlook is a personal information manager from Microsoft.
Apple Calendar
Free
Calendar is a personal calendar application made by Apple Inc. that runs on both the macOS desktop operating system and iOS mobile operating system.
BusyCal
Commercial
BusyCal is a calendar app for mac.
Lightning
Open Source
Lightning App Builder is a point-and-click tool that makes it easy to create custom pages for Salesforce1 and Lightning Experience.
Rainlendar
Freemium
Rainlendar is a calendar program for Windows, Mac OS X and Linux.
Compare Sunbird with alternatives
Compare Microsoft Office Outlook and Sunbird and decide which is most suitable for you.
Compare Apple Calendar and Sunbird and decide which is most suitable for you.