[Trisquel-users] Free software to create a bootable multiple-ISOs USB?

[khanhduongdv]

Hi everyone

I have used Trisquel for a few months and now I want to backup the OS  
partition using CloneZilla.

As mentioned in the title, I need to create a bootable USB that includes  
multiple ISOs, in my case CloneZilla and GParted. I used to use MultiSystem  
as suggested on Pendrivelinux before I realize it's non-free. The other  
programs I found only works on Windows/Wine.

What software do you suggest? Thanks in advance.