What are some alternatives?
When comparing RMPrepUSB and USB Mountr, you can also consider the following products
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.
MultiBootUSB - MultiBootUSB is a software to create multi boot live Linux on a removable media i.e USB disk.
UNetbootin - UNetbootin is a utility for creating live bootable USB drives. The name of the software is short for Universal Netboot Installer, and its most prevalent use has been to create bootable versions of Linux distributions on a USB drive.
YUMI - YUMI (Your Universal Multiboot Installer), is the successor to our MultibootISOs.
DriveDroid - DriveDroid allows you to boot your PC from ISO/IMG files stored on your phone.
Easy2Boot - Flexible and configurable USB drive multiboot solution which also supports UEFI booting.