Linux Ubuntu
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-Ubuntu is a community developed, Linux-based operating system that is perfect for laptops, desktops and servers.
-It contains all the applications you need - a web browser, presentation, document and spreadsheet software, instant messaging and much more.
-Ubuntu will always be free of charge, including enterprise releases and security updates.
-Ubuntu CDs contain only free software applications; we encourage you to use free and open source software, improve it and pass it on.
Download Free CD:Link1(direct) or Link2