Ubuntu GNOME 15.04 Beta 2

https://wiki.ubuntu.com/UbuntuGNOME
Welcome to the Vivid Vervet edition of Ubuntu GNOME, an open source and free desktop-oriented operating system that uses the controversial GNOME desktop environment on top of a stable and reliable Ubuntu base.
Distributed as 64-bit and 32-bit Live DVDs

The Ubuntu GNOME distribution is available for download as two Live DVD ISO images, one for each of the supported hardware platforms (32-bit and 64-bit). Both ISOs have approximately 1 GB in size and can be written on either DVD discs or USB thumb drivers of 1GB or higher capacity.
Offers standard boot options

The boot menu is hidden by default, as the distribution will start automatically in ten seconds from the moment the user inserts and boots the bootable medium (CD or USB) from the BIOS of his/her computer.

Default boot options include the ability to try Ubuntu GNOME without installing it, start the installation directly, check the disc for defects, run a memory diagnostic test, as well as to boot an existing OS from the local drive.
Uses the GNOME desktop environment