UCR - Ubuntu Customisation Remix
UCR aims to be a base for you to create your own LiveCD from, with complete control over what gets installed from your favourite DE/WM to which programs. It is based on Ubuntu 12.04 LTS (Precise).
UCR will come in both 32/64-bit versions and is designed to be used in/with programs such as Customizer/Ubuntu Builder/Ubuntu Customization Kit/Relinux/Remastersys.
Here is a Github page with some of the tools you can use to customise your own Ubuntu remix...