USBWriter
USBWriter lets you write an image file to an USB drive on Windows.
...It requires no installation and depends on no bloated framework, it's just a little program that you may put on your desktop.
This tool is useful to create a bootable USB disk from a Linux Live CD image file such as Ubuntu, Fedora, Gentoo or ArchLinux.
Please read the wiki in case of issues, every possible error or misbehavior is explained.