In all your examples, it is their respective company that does the packaging. Skype is packaged by Microsoft, and so on. Here is the Skype snap page, https://sn

In all your examples, it is their respective company that does the packaging. Skype is packaged by Microsoft, and so on. Here is the Skype snap page, https://snapcraft.io/skype https://snapcraft.io/skype Canonical provides the tools and several companies are providing their software as snap packages. Another example is JetBrains that provide all their development environments as snap packages.