debootstick is now part of Debian.

I wrote a tool called debootstick that was just accepted in Debian: see here.

Thanks to Alessio Treglia for mentoring!

debootstick allows to generate bootable systems (i.e. LiveUSB systems) easily. For example, debootstick can be used to turn a docker image into a bootable USB.

The other tools of this kind cannot be used in this kind of scenario because their process includes the generation of the OS content. On the contrary, debootstick takes a directory containing such an existing system as input. This makes debootstick good at collaborating with other tools (debootstrap, docker, etc.).

You can get more info about debootstick on its github page and wiki.