Outlook Google Calendar Sync Alternatives

Outlook Google Calendar Sync

Functionality:
Supports all versions of Outlook from 2003 to 2016 64-bit!
Installable and portable options - 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

Improvements:
Match entries on ID key (not a "signature" string)
Differential comparison and update only attributes that have changed.
Sync non-default Outlook calendar
Keep application responsive whilst synchronising
Full CSV export

Recognition:
This project has been forked from https://outlookgooglesync.codeplex.com .
The tool did a great job, but the project has fallen dormant and even though people were adding fixes and improvements, they weren't finding their way into the main app.

This project has therefore been created with the aim of maintaining it more actively and adding new features.