This plugin supplies many useful menu's for gnome shell
the most important being the Hplip stuff.
This attempts to start hp-toolbox but it must be installed so please do that, if the .desktop file cannot be found it will attempt to start it in the default shell this under fedora should make the system try to install it on ubuntu it will show you how to install it.
This submenu does nothing on Fedora just now as /usr/share/system-config-printer/system-config-printer.py does not exist; seems to be a Ubuntu/Debian thing.
This works out of the box in Ubuntu, however in other distros the update-manager.desktop will probably be missing. If so to make it work I do something like this (this works on fedora but should work on any system with Gnome)
gnome-software --mode=updates
The remaining menus should work on any gnome-shell instalation.