With Etcher you can burn images to SD cards & USB drives, safe & easy. It's simple for end users, extensible for developers, and works on any platform. (Apache)
Linux - Windows - macOS
LinuxLive USB Creator is a free and open-source software for Windows. It will help you in your journey of discovery with Linux. For you, LiLi creates portable, bootable and virtualized USB stick running Linux. (GPL)
Windows
Rufus is a utility that helps format and create bootable USB flash drives, such as USB keys/pendrives, memory sticks, etc. (GPL)
Windows
UNetbootin allows you to create bootable Live USB drives for Ubuntu and other Linux distributions without burning a CD. (GPL)
Linux - Windows - macOS
Universal USB Installer is a Live Linux USB Creator that allows you to choose from a selection of Linux Distributions to put on your USB Flash Drive. Simply choose a Live Linux Distribution, the ISO file, your Flash Drive and, Click Install. (GPL)
Windows
Win32 Disk Imager is designed to write a raw disk image to a removable device or backup a removable device to a raw image file. (GPL)
Windows
6 applications