HealthBarPlus lets you create custom, freely movable health bars. You can create any number of bars of either yourself, your target, your focus target or any member of your raid group or party (including pets!). You can customize the bar width, and next to each bar up to 5 active debuffs or buffs you placed on the target are displayed. You can also use the bars to switch targets by clicking on them or you can setup each bar individually for click-casting spells on the bars' target. The bars change color depending on the health of their target, and they are automatically hidden or shown.

With the command

/hbp addbar [player/target/focus/character name]

you can create a new bar with the specified target: either yourself (player), your target (target), your focus target (focus) or any raid or group member (just enter the character name). Alternatively, you can use the Blizzard raid window and drag players out with both control- and shift-key down to create bars for specific players.

The bars can be moved by dragging them with the right mouse button and deleted by clicking them with the right mouse button and the shift key pressed. Alt-rightclicking a bar will open the configuration window for this bar.

Besides displaying health (and mana/energy/rage), the bars can also show you currently running casts on the target! Below each bar, up to five casts are displayed. They are sorted by remaining cast time - very useful to quickly assess which heals are on their way to a main tank and - since your heal is quickly distinguishable from the others by the color of the casting bar - to assess whether your heal will come in just in time or whether you can stop casting since you'd anyway be too late. In addition to this, a bar can be set up to display the names of other players in your raid targeting the unit in question.