Mythbuntu is described as 'community supported add-on for Ubuntu focused upon setting up a standalone MythTV based PVR system. It can be used to prepare a standalone system or for integration with an existing MythTV network' and is a Linux Distro in the OS & Utilities category. There are more than 50 alternatives to Mythbuntu for a variety of platforms, including Linux, Self-Hosted solutions, Manjaro Linux, Arch Linux and Chrome OS. The best alternative is Manjaro Linux, which is both free and Open Source. Other great apps like Mythbuntu are elementary OS (Free, Open Source), Xubuntu (Free, Open Source), Kubuntu (Free, Open Source) and Lubuntu (Free, Open Source).
Ubuntu Mate is a stable, easy-to-use operating system with a configurable desktop environment. Ideal for those who want the most out of their desktops, laptops and netbooks and prefer a traditional desktop metaphor.