USB Mountr!

The Reliable USB Formatting Utility

Etcher is a free and open-source image burner with support for Windows, OS X and GNU/Linux. It makes USB and SD card image burning as simple and fast as possible.

CD image files are easily created with UltraISO. Duplicate discs to a CD image, create bootable CDs and audio CD images - and UltraISO also handles DVD image files. If you need to know how to make a CD image or need to edit an ISO image file, UltraISO is the tool you need.

MultiBootUSB is a software to create multi boot live Linux on a removable media i.e USB disk. It is similar to UNetbootin but many distros can be installed, provided you have enough space on the disk. MultiBootUSB also provides an option to uninstall distro(s) at any time, if you wish.

WinToFlash starts a wizard that will help to make USB bootable and pull over the contents of a windows installation CD or DVD and prep the USB drive to become a replacement for the optical drive. It can also do this with your LiveCD or DOS.

BurnAware is a family of full-featured burning software to create CD, DVD and Blu-ray discs of all types. Home users can easily burn bootable discs, multisession discs, high-quality audio CDs and video DVDs, make, copy and burn disc images. Power users will benefit from BurnAware's advanced options, including control of boot settings, UDF partition and versions, ISO levels and restrictions, session selection, CD text for tracks and discs, data recovering, disc spanning and direct copying.

WinSetupFromUSB is a Windows program, which prepares multiboot USB flash or fixed disk to install any Windows versions since 2000/XP, boot various Linux and *BSD flavors, as well as many Windows, Linux, DOS based and other utilities. Since version 1.1 program can create USB disk with Windows versions which support (U)EFI (Vista x64 SP1 and later x64 versions), which USB disk can be used in both (U)EFI and Legacy BIOS modes.

You can prepare an Easy2Boot USB drive using Windows or linux.Then add all your payload files (.iso, .img, .ima, etc.) to one of the folders on your USB drive (e.g. \_ISO\MAINMENU folder) by drag-and-drop at any time. A new menu is automatically created each time you boot from it.Works with 99% of linux liveCD ISOs and supports Windows Install ISOs too! Install from an unmodified XP ISO file to a RAID/AHCI/SATA system (no need to nLite the ISO first).The USB drive can be formatted as FAT32 or NTFS (or exFAT, ext2/3). UEFI booting of linux and Windows is supported by creating .imgPTN partition image files. Boot to any number of Windows Vista/7/8/MSDaRT and linux UEFI OS's. »

SARDU (short for Shardana Antivirus Rescue Disk Utility) creates a multiboot all-in-one USB drive, CD or DVD for free (personal and non commercial use). Hard disks, external hard disks and all removable media are supported.The bootable device can include comprehensive collections of antivirus rescue cd, utilities and popular live distributions of Linux. Windows PE can also be included, as well as recovery disks and install media for Windows XP, Windows Vista, Windows Seven and Windows Eight.The multiboot USB supports and manage USB stick, pendrive, hard disks and all removables media. »

Multisystem is an awesome tool created by LiveUSB.info, that works similar to our Windows based MultiBootISOs USB creator, but was created for use within Linux. It also uses Grub2 instead of Grub Legacy, and can be run from within Ubuntu Linux to create a Custom Multiboot UFD containing your favorite Bootable Live Linux Distributions. (via http://www.pendrivelinux.com/multiboot-create-a-multiboot-usb-from-linux/ )

DiskMaker X (formerly Lion DiskMaker) is an application built with AppleScript that you can use with many versions of OS X/macOS to build a bootable drive from OS X/macOS installer program (the one you download from the App Store). As soon as you launch the application, it tries to find the OS X Install program with Spotlight. Then, it proposes to build a bootable install disk and make it look as nice as possible. It’s the easiest way to build an OS X/macOS Installer in a few clicks! Then you can use the Install drive to fully re-install the OS on a freshly formated drive, or install it on your many Macs without re-downloading the full installer. »

LiveUSB Install is a free software for GNU/Linux and Windows.

RMPrepUSB allows the Windows user to easily and quickly 'roll their own' multiboot USB drive.

Utility for writing raw disk images & hybrid isos to USB keys.