Qubes OS
Qubes OS is a free and open-source, security-oriented operating system for single-user desktop computing. Qubes OS leverages Xen-based virtualization to allow for the creation and management of isolated compartments called qubes.
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ALT Linux
ALT Linux was founded in 2001 by a merge of two large Russian free software projects. By the year 2008 it became a large organization developing and deploying free software, writing documentation and technical literature, supporting users, and developing custom products.