If you are a Google Calendar or a Gmail user, Gsync Manager is probably one of the must have apps on your Windows 8 tablets or laptops. The app allows you to sync multiple calendar across different devices. The free app once installed allows calendar users to easily select the calendars to sync across their devices. When you install the app and login, you can see all the devices which uses the Calendar (namely Windows Phone and iOS devices).
For each device it shows the calendars available and you can select the ones you need to sync across all the devices.
The app lists out all the devices and for each device, you can view the available calendar.
And if you are a Gmail user, you can easily set options like “Send Mail As” and “Delete Email As Trash” for the device.
The calendar sync across multiple devices is a pretty useful feature for Windows 8 users.