It is announcer addon.
It warns you raid or paty about
:
1)Gain and fade of Shield Wall, Last Stand (warrior/druid/dk versions).
2)Disarm/Ripost/Dismantle on you.
3)Taunt-like as well as Mass-taunt miss|resist|immune, of any class.
Also:
Announce Shield Bash use and interrupt.
Announce party/raid member and pets taunt uses.
You can turn announce of sh.bash and taunt on and off.
/tbw help

Change Log:0.2
+Druid Tanking: Growl, Challenging Roar.
+Warrior: Challenging Shout.
0.3
+Channel setup
0.4
+WotlK
+SpellID spell check so work with any local.
0.5
+Druid: Berserk
0.6
*Small bugfix.
0.75
+DK: Dark Command
*Last Stand bugfix
0.76
+DK: Icebound Fortitude
0.80a
+Arena channel
+Raid channel
*Settings bugfix
0.81
*Syntax bugfix
0.82
*Channel bugfix
0.83
*Raid detection bugfix
1.0
+Taunt announce
+Paladin HoR
+Announce switch
1.01
*Bugfix: Tripple taunt detection messages
1.02
+Taunt detection: Shaman Spirit Wolves
1.04
*.toc file change
1.05
+Taunt: hunter pet skill from talent
*Some message changes