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.
Balena Etcher - Flash OS images to SD cards & USB drives, safely and easily.
SUSE Studio ImageWriter - Utility for writing raw disk images & hybrid isos to USB keys.
WinUSB - multiboot - WinUSB - simple, portable and lightweight tool, lets you create multiple Windows bootable USB flash...
ROSA Image Writer - Rosa Image Writer is a program for writing images to a flash disk.
YUMI - YUMI (Your USB Multiboot Installer), is a tool that allows you to boot multiple ISO files from one USB drive.