Lukutoukka is a one word at a time text reader for the GNOME desktop. It reads a text file and displays the contents one word at a time at an adjustable speed.
Lukutoukka is available under the terms of the GNU General Public License.
Now imagine that word being replaced by the one after it, really, really fast.
Of course, guile-gnome brings with itself a large dependency tree.
As of this writing (2005-05-07), all the dependencies except guile-gnome itself are available in Debian. The g-wrap library is in the package guile-g-wrap.
You can download the latest version from here.
The darcs repository
is also available.