[homarp]

GTK was originally designed and used in the GNU Image Manipulation Program (GIMP) as a replacement of the Motif toolkit;

https://en.wikipedia.org/wiki/GTK

[homarp]

https://web.archive.org/web/19990417052141/http://www.linuxw...

"GTk (GIMP Toolkit), the windowing toolkit that now lies at the core of the Gnome desktop, was originally written as part of GIMP."