Gnome Shell Extension Inhibit Applet is a gnome shell extension that gives you the ability to inhibit auto-suspend or screensaver from activating, simular to the original applet in gnome 2. It will add a new button on the panel with a dynamically changing icon to allow the user to see if the inhibit applet is active. Text describing the current state is shown on mouse hover.
Note: Binary files aren't shown on the web site. To see all files, please download the extension zipfile.
Yep.
Inhibit Applet