It looks like the personal resource display. Check SpartanUI's options, first - if there's nothing in them about that, try the default options.
In my defense I must say that I haven't played WoW in two years, and I'm not sure what's going on with the newest expansion.
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Ahhhh, the vagueries of the aging mind. Wait.... What was I saying?
Carbonite <----- GitHub main module (Maps ONLY) download link. The other modules are also available on GitHub.
Carbonite-CLASSIC<----- GitHub link to Carbonite Classic. Thanks to ircdirk for this!