Material shell is one of the gnome-shell-extensions that we ship with Gnome edition. It’s totally different and awesome tiling experience for gnome. Great for productivity, beautiful, intuitive and fun to use.
Material shell is a small project, and it’s developer is looking for opportunity to work on this project full time. This would greatly benefit it’s developement, and by extension Manjaro gnome edition. Because it is a free to use and open project, it does not generate any revenue in itself. So, donations and sponsors are needed.