Stuf is brought to you by the creator of Stellar Unit Frames. It starts with the same layout as its predecessor, but Stuf is much more customizable - up on the level with PitBull and Discord, if you wish to do more with it. In the above screenshot are examples of some layouts that users have accomplished with it (yes, even the HUD). In addition to the main features that most unit frame addons have, Stuf also displays range indicators (ex: 0-5 yards), Shaman totem timers, timer bars for your buff/debuffs on target and focus, and a button on unit frames to inspect that player. And, on top of all this, it runs with decently low memory/CPU usage.
To view all of its features and have a go at customizing it to fit your needs, see the download page.
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff, The Tao of Pooh