Ksplice

You know those "You must reboot to install new updates" pop-up messages? Ksplice is an enterprise software company that makes those reboots a thing of the past, by transforming the updates so they can be installed without rebooting. Hundreds of thousands of production systems use Ksplice make their Linux systems more secure, reliable and maintainable through seamless updates. Ksplice was acquired by Oracle in 2011.