Best light weight linux distro to dual-boot alongside Ubuntu 13.04

Hi

I would like to know which light weight Linux distro would be best to dual boot alongside Ubuntu 13.04.

Thanks

via Bleeping Computer Last 20 Posts http://www.bleepingcomputer.com/forums/t/501778/best-light-weight-linux-distro-to-dual-boot-alongside-ubuntu-1304/