gtk3 topic
awesome-gtk
List of awesome GTK (3/4) applications
cpupower-gui
cpupower-gui is a graphical program that is used to change the scaling frequency limits of the cpu, similar to cpupower.
desktop-entry-creator
A user-friendly GUI for creating desktop entries for installed applications on Linux
bups
Simple GUI for Bup, a very efficient backup system.
iridium
Native Linux IRC client built in Vala and Gtk for elementary OS
gsimplecal
Simple and lightweight GTK calendar (BSD license)
gnome-twitch
Enjoy Twitch on your GNU/Linux desktop
tomate-gtk
A Pomodoro timer written in Gtk3 and Python for Linux desktops.
glide
Linux/macOS media player based on GStreamer and GTK
sc-controller
User-mode driver and GTK3 based GUI for Steam Controller