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.
rednotebook
RedNotebook is a cross-platform journal
ofxGPIO
Library C++ for raspberrypi and orangepi, GPIO interfaces compatible with openframeworks.
pywebview
Build GUI for your Python program with JavaScript, HTML, and CSS
nwg-launchers
GTK-based launchers: application grid, button bar, dmenu for sway and other window managers
flat-remix-gtk
Flat Remix is a GTK application theme inspired by material design. It is mostly flat using a colorful palette with some shadows, highlights, and gradients for some depth.
gaphor
Gaphor is the simple modeling tool
foliate
Read e-books in style
go-rsync
Best GTK+ frontend (backup application) for RSYNC utility.
paperwork
Personal document manager (Linux/Windows) -- Moved to Gnome's Gitlab