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Google Outlook Calendar Synchonization Tool, Share Calendar Free
SyncMyCal - Microsoft Outlook Google Calendar Synchronization Tool
Two-way calendar synchronization – Outlook to Google and Google to Outlook.
Selective event synchronization through date range selection.
Flexibility of publishing/not publishing private events in Outlook Calendar to Google Calendar.
Multiple Google Calendars can be connected to single Outlook Calendar and vice versa.
Support for Time zone differences in calendars through automatic schedule adjustment.
Synchronize event information with your PDA (coming soon).