Giving only one option per category may not be enough. There are usually several great FOSS apps for each, targeting different uses. Some more choices here: https://github.com/awesome-selfhosted/awesome-selfhosted

The other issue is that most users won't maintain their own server or keep up with security updates and such. That's why I launched https://pikapods.com, which allows anyone to run FOSS apps with a few clicks, while supporting app authors via our revenue share. Our 'app store' is here: https://www.pikapods.com/apps