CorePaint is a free and open source painting application for Linux. It is a simple and easy to use paint program. It is released under GNU General Public License v3.0 . It comes with basic tools like line, eclipse, curve, rectangle, pen, eraser, text, spray paint, fill paint, color picker and undo, redo, select, share it and pin it.
How to install CorePaint on Ubuntu Linux
You can install CorePaint via flatpak package file from the flathub store. First install flatpak and flathub on your system and restart it after the installation. Follow below link for the installation instructions.
After that open the terminal app (ctrl+alt+t) and run below CorePaint flatpak installation command. It will install the latest version of CorePaint on your system/
flatpak install flathub org.cubocore.CorePaint
After the installation, you can open it using below command.
flatpak run org.cubocore.CorePaint
And you can also uninstall it using below commands.
flatpak uninstall org.cubocore.CorePaint
sudo flatpak uninstall org.cubocore.CorePaint