What's it?

[zaoqi]

Is it just koreader?
Can Xfce and packages of http://ftp.debian.org/debian/ work?

[pazos]

@zaoqi it is a linux distribution based on debian which uses KOReader as the main application.

Since KOReader talks to the framebuffer (and update the e-ink screen) by itself this distro does not have any other framebuffer drivers.

That means that any debian command line binary will work (except framebuffer stuff (fbv, fbgrab ..) but X11 apps won't unless you rebuild xorg server with added support for e-ink updates, like in https://github.com/fread-ink/fread-ink/tree/master/graphics/x-server/