Kubuntu

http://linux.softpedia.com/get/Linux-Distributions/Kubuntu-Vivid-Vervet-103658.shtml#download
Welcome to the Vivid Vervet edition of Kubuntu, a special flavor of the Ubuntu Linux operating system built around the modern and eye-candy KDE desktop environment. It is a desktop-oriented distribution of Linux that includes a wide range of powerful and useful applications.

Distributed as 32-bit and 64-bit Live DVDs

At the moment, the Kubuntu 15.04 operating system is distributed as two Live DVD ISO images, one for each of the supported hardware architectures (64-bit/amd64 and 32-bit/i386), which have approximately 1 GB in size each and can be written to either USB thumb drives of 2GB or higher capacity (recommended) or blank DVD discs. This edition is supported with security patches and software updates until October 2015.