Rufus is Free and Quickly Makes Bootable Usb

Rufus is the right and fast tool for formatting and making USB flash devices into bootable operating systems, such as flash, memory cards, etc. And another great Rufus is free, because Rufus itself is Open Source. 
Rufus is very useful for cases where:

•      You need to create a USB installation media from a bootable ISO (Windows, Linux, UEFI, etc.)
•      You need to work on a system that does not have an OS installed
•      You need to flash the BIOS or other firmware from DOS
•      You want to run a low-level utility

Despite its small size, Rufus provides everything you need!

One more, Rufus is very fast. The proof, Rufus is approximately two times faster than UNetbootin, Universal USB Installer or Windows 7 USB download tool, in making the installation media USB of Windows 7 from an ISO. Rufus is also slightly faster in making bootable Linux USB than ISO files.

Main Features:

1. 
   Fast Process
2. 
   Support Linux
3. 
   Just 4 Steps

Rufus is licensed Public GNU General (GPL) version 3 or later. You are free to distribute, modify or even sell this software, as long as you respect the GPLv3 license.

Rufus is written in the C programming language. Rufus supports various bootable iso files, including various Linux distributions and Windows .iso installation files, as well as raw disk image files (including compressed files). If needed, it will install bootloader like SYSLINUX or GRUB to flash drive to make it bootable. [8] It also allows the installation of MS-DOS or FreeDOS into flash drives as well as the creation of bootable Windows media. It supports flash drive format as FAT filesystem, FAT32, NTFS, exFAT, UDF or ReFS. Rufus bootable process is very fast compared to other bootable, even Rufus is the fastest. But unfortunately Rufus is only available for Windows system operation. 

Windows:

Rufus 2.17 (944 KB)

Rufus 2.17 Portable (944 KB)

Other versions

Official Page