qemacs (Quick Emacs text editor)

QEmacs (Quick Emacs) is a small but powerful UNIX editor targeted at
embedded systems or debugging. Although it is very small, it features
multi-buffer/multi-window editing, full Unicode and UTF-8 support,
a built-in shell mode with full color VT100 terminal emulation,
and binary/hexadecimal in-place editing.

It can open and edit huge files (hundreds of megabytes) without
delay by using a highly optimized internal representation and memory
mapping.

NOTE:
By default, this SlackBuild compiles QEmacs as a pure text-mode (TTY)
editor by passing --disable-x11 to the configure script. If you want
X11 graphics and Xft anti-aliased font support, you can edit the
SlackBuild script to remove the --disable-x11 flag before building.