I am running Ubuntu GNOME 15.10 with GNOME 3.18, and there is one thing lacking, a power monitor tool which will display the status, the one in Ubuntu MATE looks like this:
Ubuntu (Unity) also has a similar one, but I can't seem to find one installed by default on Ubuntu GNOME, so is there one that I just haven't found or one that I can install that's made for GNOME, or is not DE specific?