Rufus Alternatives

With balenaEtcher people can create an installation media of your operating system by burning the image on a bootable flash drive. The software, that was previously known as Etcher, is developed by Balena and the open-source community and released free of charge under the Apache-2.0 License. balenaEtcher can be downloaded and used for following operating systems: macOS, Linux and Windows.

UNetbootin, short for Universal Netboot Installe is a tool that allows you to easily create bootable USB flash drives to install or try operating systems. This software is designed to be cross-platform and works with Windows, as well as Mac and Linux operating systems.

MultiBootUSB is a cross platform software that allows you to install multiple live linux on a USB disk non destructively and option to uninstall distros. MultiBootUSB is written in Python and is released as free and open-source software under the GPL-2.0 License.

A really simple open-source, GUI application that writes compressed disk images to USB drives and creates backups. USBImager is avalible for Linux, macOS, and Windows.
 

Ventoy is a free and open source tool that you can use to create bootable USB drive for ISO,WIM, IMG,VHD, and EFI files. You can copy many files at a time with Ventoy, instead of formating disks over and over again. Ventoy supports x86 Legacy BIOS, IA32 UEFI, x86_64 UEFI and ARM64 UEFI.

Win32 Disk Imager is a tool for creating bootable USB drives.