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Ubuntu Unleashed 2013 Edition: Covering 12.10 and 13.04, Eighth Edition by Matthew Helmke

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Open-Xchange

Open-Xchange has a great pedigree, having been owned and developed by Novell/SUSE until being spun off by itself into its own company. Working with open standards, it provides a number of collaboration options and is firmly based on Linux. It can work with a wide variety of protocols, making it one of the best connected suites available. You can get the open-source version at www.open-xchange.com.

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