Rescatux - Rescatux is a GNU/Linux rescue cd (and eventually also Windows) but it is not like other rescue...
Hirens BootCD - Hirens BootCD is a powerful, all-in-one boot disk utility that will help you resolve and make reformatting your computer easily.
Ultimate Boot CD - The last Boot CD you'll ever need. You need the Ultimate Boot CD if you want to:
SystemRescueCd - SystemRescueCd is a Linux system rescue disk available as a bootable CD-ROM or USB stick for...
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.
Ventoy - Ventoy is an open source tool to create bootable USB drive for ISO files.