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Nagios is the industry-standard in IT infrastructure monitoring. Nagios provides enterprise-class Open Source monitoring of hosts, services, applications, and networks. Learn why organizations around the world trust Nagios to handle their IT infras...

Nagios Exchange - The official site for hundreds of community-contributed Nagios plugins, addons, extensions, enhancements, and more!

Nagios Enterprises provides commercial solutions around Nagios - the industry standard in IT infrastructure monitoring. Learn why organizations around the world trust our products to handle their IT infrastructure monitoring and business process con...

SourceForge.net. Fast, secure and free downloads from the largest Open Source applications and software directory

YouTube is a place to discover, watch, upload and share videos.

Provides Instruction Guides, How-Tos, Troubleshooting Tips and Tricks on Linux, Database, Hardware, Security, Web and Open Source for both Newbies and Geeks - TheGeekStuff by Ramesh Natarajan

Tecmint - Linux Howtos, Tutorials, Guides, News, Tips and Tricks.

This blog focuses on Windows administration. You?ll find articles about free admin tools, system management tools, Windows technology, reviews of admin tools, tips for admins, and IT news for system administrators.

IT Best Practices, How-tos, Product Reviews, discussions, articles for IT Professionals in small and medium businesses

Reviews and free software downloads for Windows, Mac, Palm, Pocket PC, and Mobile Phones. The best programs and games. Buy software directly online.

System Administration blog by Tecadmin.net – Includes news, help, tutorials, programming, tips and how-to guides for administration, Windows, UNIX , OSX and BSD.