OpenXchange – A Unix based Proxy Server

Open-Xchange Server is a partially open source project sponsored by Open-Xchange, Inc., developing collaboration software; i.e. email, calendaring, etc. Product offerings based on Open-Xchange Server are marketed under the brand of Open-Xchange Server and various other names, e.g. 1&1 MailXchange, Network Solutions Business Email and others. Open-Xchange Server is part of the Lisog open source stack initiative.

Open Source CRM

SuiteCRM - Complete CRM Solution as Open Source

SuiteCRM is a free and Open Source CRM Tool equipped with standard features and modules of No#1 CRM in its professional edition. Additionally, functionalities such as Mobile, Google Docs integration will work with SuiteCRM. SalesAgility has developed reporting, workflow, quotes, products, security and portal extensions that enable SuiteCRM to deliver the complete package for a CRM Tool. The new functionalities for event management and mapping have also been included to the SuiteCRM.

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iFolder - Open Source Sync Tool

Developed by Novell in 2001, iFolder is a cross-platform file synching application. Can synchronize one folder to multiple computers with different operating systems.

rsync - Open Source Sync Tool

For those who know how to use the command line, rsync is a fast incremental file transfer utility. Requires manual configuration to setup correctly.