Rufus allows you to create bootable USB sticks using ISO files. Particularly interesting is the possibility to create UEFI-compatible sticks for the UEFI-mode installation of Windows.
Rufus runs significantly faster than other tools of this class, such as Unetbootin or the Windows 7 USB download tool. For the creation of a USB stick using Windows 7 64-bit, the tool requires little more than three minutes. Unetbootin takes six minutes, while the Windows 7 USB download tool takes more than eight minutes.