Qubes is an open source operating system designed to provide strong security for desktop computing. Qubes takes an approach called security by compartmentalization, which allows you to compartmentalize the various parts of your digital life into securely isolated compartments called qubes. This approach allows you to keep the different things you do on your computer securely separated from each other in isolated qubes so that one qube getting compromised won’t affect the others.
- Qubes is fantastic for security freaks. It runs programs in disposable VMs so that things can't cross contaminate/infect each other. But this is a hassle and far from what the average Ubuntu user will want from their system. Huge thumbs up for Qubes, but just not as an Ubuntu replacement.