icon2gif(1) on Linux
The text abc43ef963c9, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it. The page shows this text now.
A program to convert a series of editable text GIF icon specifications and named GIF files into a multi-image GIF, usable as a graphic resource file. It can also dump existing GIFs in this format.