Shows your targets cast bar in a seperate (movable) window.

Tarien has made a video on youtube showing how to configure TCB (and its sister addon CBR):

http://www.youtube.com/watch?feature=player_embedded&v=l__OJFpvD9E

To see all available options:

/tcb

Options summary:

/tcb this - this will set tcb watching your CURRENT target, even if you then change targets, it will continue watching the 'this' target.
/tcb target - will go back to watching your active target, changing as you change targets.

/tcb scale #.## - applies a scaling to the window to change its size, either larger (scale >1) or smaller (scale <1)

/tcb deplete - the bar starts full and empties as time runs out
/tcb fill - the bar starts empty and fills as time runs out

/tcb reset - resets all options to their defaults

If you do not like my choice of colours for the bars and text, then you can specify your own!

/tcb col bi|bu|ti|tu R G B

bi - Interruptible Bar color
bu - Non-Interruptible Bar color
ti - Interruptible Text color
tu - Non-Interruptible Text color

R/G/B are numbers in the range 0-1

For example, to set the interruptible bar color to what the default is:

/tcb col bi 0.16 0.1 0.5

Not the most convenient way of doing it, but in lieu of a colour picker window being available, it does at least offer the option.

[New in 1.0 - thanks Kalvir (Zelandonii on Steampike)]

/tcb textsize ## - sets fontsize
/tcb remain/total - shows SpellName [remain/total]
/tcb remain - shows SpellName [remain]
/tcb total - shows SpellName [total]
/tcb nameonly - shows SpellName

[New in 1.01]

/tcb lines - toggles castbar text display between 1 and 2 lines

[New in 1.2]

/tcb focus - watches current active focus target
/tcb targettarget - watches current target's target
/tcb border - toggles display of border
/tcb channel - toggles bar direction for channeled spells

[New in 1.2a]

/tcb texture - toggles use of texture on bar

[1.2b]

/tcb truncate - toggles whether text that is too long for the bar is truncated

[1.3]

/tcb align L/C/R - aligns bar text
/tcb interrupt - toggles display of all spells or only those that are tagged as interruptible
/tcb alpha - sets an overall base alpha
/tcb prec 0/1/2 - sets the number of decimals to use
/tcb custom X Y - sets the bar to exactly X x Y pixels

Added alpha parameter to /tcb cols

[1.4]

/tcb config - toggles display of castbar. Can be dragged and shows other changes as they are made (replaces lock/unlock)
/tcb undo - undoes any changes made this session

[1.5]
/tcb background - toggles display of background colour (+texture)

[1.6.1]
/tcb loadprofile NAME - loads the saved NAME settings
/tcb saveprofile NAME - saves current settings as NAME
/tcb listprofile - list profiles