Kubuntu Linux 14.10 Desktop
Release quote : "Kubuntu 14.10 is available for upgrade or install. It comes in two flavours, the stable Plasma 4 running the desktop we know from previous releases, and a tech preview of the next generation Plasma 5 for early adopters. Plasma 4 is our recommended stable offering and what you get from the default download, but is now in maintenance mode. It runs the software you are familiar with and will be getting updates and bugfixes but not new features from now on. Plasma 5, the next generation of KDE Software is still a work in progress. You can test it and install it from the Kubuntu Plasma 5 image but beware it will remove your stable software. We love testers but no support is offered. If there are problems you may need to reinstall to revert back to Plasma 4..."