The first WebUpd8 PPA updates part isHERE.
Multiload-ng is a graphical system monitor for the Xfce, LXDE, and MATE panels (for both GTK2 and GTK3), forked from the old GNOME Multiload applet. It can also run in a standalone window.
The applets are highly configurable, allowing you to select the orientation, change the graph size, update interval, and it also ships with quite a few color schemes. With the latest 1.4.0 release, Multiload-ng includes a Unity (and others) AppIndicator, as well as a systray applet.
Here's the new Multiload-ng AppIndicator running in Unity (with Ambiance color scheme):
And the new Multiload-ng Systray running in LXDE (Lubuntu 14.04 which is not supported by the Multiload-ng LXDE panel applet, but you can now use Multiload-ng Systray):