That looks like Elkano's Buffbars. Try disabling that in the Addons screen and see if that goes away. Also, you can type /ebb config and it should open a config window that will allow you to show the anchor for that group and move it, if you want to keep it.
Yes, that's EBB, and it is no longer included in my UI pack.
Serious note here guys. If you are installing my UI pack, then you need to completely get rid of all your old saved variables and addons. Even if you just rename the folders for the sake of keeping your key bindings or chat channels. I'm seeing a lot of questions lately about things going wrong with my pack, and a lot of times its because you still have conflicting saved variables or addons installed.
Once you have my pack up and running, then you can go ahead and start installing other things that I don't use like SimpleCombatLog, or other FuBar plug ins etc.
That's eCastingBar. As per the read me in the change log I stated that ecb was not saving profiles between characters with no way to load them either. You will need to copy the saved variables from your warcraft directory warcraft/WTF/Account/YOURACCOUNT/Server/Character/SavedVariables/eCastingBar.lua to another character.