OutlookGoogleCalendarSync (Portable) v2.4.0

OutlookGoogleCalendarSync offers free calendar synchronisation between Outlook and Google, including attendees and reminders, no install necessary, works behind web proxies and actively developed.

Functionality

Supports all versions of Outlook from 2003 to 2016 64-bit!

Portable - even runs from a USB thumbdrive

Synchronises items in any calendar folder from
- Outlook to Google
- Google to Outlook
- Two-way/bidirectional sync

Includes the following event attributes:
- Description
- Location
-Attendees (including whether required or optional)
- Reminder events
- Availability (free/busy)
- Privacy (public/private)

Customisable date range to synchronise, past and future

Frequency of automatic syncs, including push from Outlook

Configurable proxy settings, or use Internet Explorers

Merge new events into existing on destination calendar

Prompt on deletion of items

Can run unobtrusively in the system tray, with bubble notifications on sync

Ability to obfuscate custom words for privacy/security

Syncs recurring items properly as a series