UNetbootin Portable, offered via PortableApps, permits you to create bootable Live USB drives for Ubuntu and other Linux distributions without burning a CD. UNetbootin installer is also available.

You have the choice of downloading one of the many distributions supported out-of-the-box, or you can supply your own Linux ISO file if you've already downloaded one or your preferred distribution isn't available.

UNetbootin Portable has built-in support for automatically downloading and loading the following distributions, though installing other distributions is also supported:

Ubuntu (and official derivatives)

Debian

Linux Mint

openSUSE

Arch Linux

Damn Small Linux

SliTaz

Puppy Linux

FreeBSD

NetBSD

Fedora

Rawhide

PCLinuxOS

Sabayon Linux

Gentoo

MEPIS

SimplyMEPIS 8

Zenwalk

Slax

Dreamlinux

Elive

CentOS

Mandriva

LinuxConsole

Frugalware Linux

xPUD

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