It is developed by volunteers around the world. It is Open Source software, distributed under the terms of the GNU General Public License. Tux Paint is free of cost and free of advertisements.
'The 7 Best Open-Source Paint Alternatives for Linux', 'Make Use Of', July 2021 Older versions of Tux Paint have been released for a variety of other platforms, as well. The latest version of Tux Paint runs on a variety of platforms, including Windows (Vista and later), macOS (10.10 and later), Linux, Android, Haiku, and more. Tux Paint 0.9.30 and friends have been released and are available for Microsoft Windows, Apple macOS, Android (via Google Play Store), Android (via F-Droid), Android (direct download), Red Hat Linux, Haiku, Slackware Linux, various Linux distributions (via Flatpak).