“Zack Smith announced that he has been working on an in-kernel
2D GUI for the 2.6 Linux kernel called FBUI. Based on the
framebuffer, the project page explains, ‘FBUI is a small, in-kernel
graphical user interface for Linux. It permits you to put windows
in each framebuffer-based virtual console, to read keyboard input
and track the mouse pointer.’ The core software measures in at a
mere 26k, adding an additional 17k for a graphical library, 30k for
a window manager, and 38k for a terminal emulator…”