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Gear Lever: An Open Source Tool To Manage AppImage Apps on Linux
(news.itsfoss.com)
I’ve used this recently and it works pretty well. AppImage isn’t my cup of tea but it’s hard to argue with “it just works”
The GNOME Project is a free and open source desktop and computing platform for open platforms like Linux that strives to be an easy and elegant way to use your computer. GNOME software is developed openly and ethically by both individual contributors and corporate partners, and is distributed under the GNU General Public License.