openSUSE Software
https://software.opensuse.org/package/appimagedappimaged is a daemon that handles registering and unregistering AppImages with the system (e.g., menu entries, icons, MIME types, binary delta updates, and such). The package comes also with appimage.validate CLI tool to verify signature of AppImage files. There is no official package available for openSUSE Leap 15.3
How to install AppImage in Linux
https://linuxpip.org/install-appimage11.09.2020 · How to run and install AppImage? The very first thing you must do after finish downloading an AppImage is make it executable. You can do this using the graphical user interface, or the terminal emulator. To do this in a terminal, for example for Firefox, run: chmod u+x ~ /home/ linuxpip/Firefox-x86_64 -20200413141725.
Obsidian – AppImageHub
https://appimage.github.io/ObsidianUsage. Obsidian is available as an AppImage which means "one app = one file", which you can download and run on your Linux system while you don't need a package manager and nothing gets changed in your system. Awesome! AppImages are single-file applications that run on most Linux distributions. Download an application, make it executable, and run!
AppImage | Linux apps that run anywhere
https://appimage.orgNo need to install. Runs on most 32-bit and 64-bit Linux desktops. Try Subsurface AppImage (64-bit) Many upstream projects like Krita, Subsurface, MuseScore, KDevelop, and digiKam have started to provide AppImages directly on their download pages. More AppImages for other applications like Atom, Arduino, Blender, Chromium, Firefox, LibreOffice ...