Rufus - Rufus is a piece of software that allows you to transform a portable drive, like a flash drive or other USB drives, into a bootable drive that can be used for a variety of purposes. Read more about Rufus.
Tuxboot - Tuxboot helps you to create a bootable Live USB drive for Clonezilla live, DRBL live, GParted live...
Balena Etcher - Flash OS images to SD cards & USB drives, safely and easily.
EasyBoot - EasyBoot makes creating a bootable CD or bootable DVD a straightforward process.
mkusb - (Straight up rufus for Linux users ) The mkusb tool was developed to make it simpler and safer to create boot drives with the method to flash or clone an iso image or a compressed image file. It is using dd under the hood.
KDE ISO Image Writer - KDE ISO Image Writer is a tool to write a .iso file to a USB disk.