GTK topic
GTK (formerly GIMP ToolKit and GTK+) is a free software cross-platform widget toolkit for creating graphical user interfaces. It is licensed under the terms of the GNU Lesser General Public License, allowing both free and proprietary software to use it. It is one of the most popular toolkits for the Wayland and X11 windowing systems.
rlr
interactive pixel screen ruler and protractor
emeus
Constraint-based layout manager for GTK+
gnome-podcasts
Main repository is over at the GNOME gitlab instance
marmoset
Marmoset is a single-player implementation of the card game SET.
gruvbox-dark-gtk
A colorless gruvbox dark theme for GTK 2.0 and 3.0.
gruvbox-gtk
Gruvbox theme for gtk - created with oomox
akbl
Control the lights of Alienware computers under GNU/Linux systems.
NiGui
Cross-platform desktop GUI toolkit written in Nim
yoru
夜 - Yoru | Aesthetic and Beautiful Awesome Environment :first_quarter_moon: