Then you are able to sync events and task from Google / iCloud / Yahoo! Calendar with another softwares (iCalendar, Mozilla Lightning/Sunbird, etc.) or with your mobile gadget (Android, iPhone, iPad, etc.). There are instructions which describe how to do that.
This tool works as a native Lotus Notes/Domino database on Windows, on Linux or on Mac (on any operation system where Lotus Notes/Domino runs).
System Requirements: Lotus Notes/Domino 6.X/7.X/8.X.