Cambalache is a free and open source Gtk user interface creation software for Linux. It is released under the GNU Lesser General Public License version 2.1 (LGPL). Using this application you can make and edit Gtk 4 and Gtk 3 software UIs. It follows MVC design and data model philosophy. It supports the rendering the workspace out of process using the Gdk broadway backend to support multiple gtk versions.
Install Cambalache on Ubuntu Linux
Cambalache is available via flatpak from flathub for your Ubuntu Linux system. you can easily install it via the terminal command-line application. For that, first you need to install flatpak and flathub on your system. If you already installed just skip and directly install Cambalache on your system. other wise follow below link for flatpak and flathub installation steps. After the flatpak and flathub installation restart your system.
Open the terminal app (ctrl+alt+t) after the system restart and run below Cambalache flatpak installation command. It will install the latest version of Cambalache on your system.
flatpak install flathub ar.xjuan.Cambalache
You can run it via below command
flatpak run ar.xjuan.Cambalache
You can uninstall Cambalache via below command.
sudo flatpak uninstall ar.xjuan.Cambalache