Red Hat/Fedora, GNOME, KDE and others have brought things that can be used in the Linux Community, like NetworkManager, Plymouth Boot Splash, a friendlier desktop system, etc. I would like to know what Ubuntu has brought to the Linux Community.
Things that I know of are Unity Desktop and UTouch (which I find to be an excellent feature). Note that I am not talking about obvious things like look & feel, huge community, etc. I am talking about features that it has added or enhanced in the Linux community.