I am looking for a lightweight window manager/desktop environment similar to Unity, but not Unity/Unity-2D GNOME or KDE. Specifically, I'm looking for something light with the following features:
window buttons layout like in Unity.
side bar/dock on left with system tray, apps, devices & a menu of some sort.
or a top bar with system tray, apps, devices & a menu of some sort.
The reason I am looking for this is that my computer can't handle Unity & my development apps at once any more.