This is an addon for warrior. It's primary purpose is to help people time their slam attack with a 2-hander. It works in two ways:
-it displays a rather large cooldown bar for your swing timer, counting down to when your next swing should be ready. It is intended to be big so you can see it from the corner of the eye, but feel free to change the size.
-displays the delay between your last hit-slam sequence. The number is precise as I could get it, but it's far from perfect. It helps you to evaluate when you should start casting slam to have both your white hit and your slam, confirming when you messed it due to server hiccup (4.7 hit-slam delay with a 3.6 weapon and a 0.5 sec cast just doesn't add up).
In a pvp context, it helps knowing when you shouldn't bother getting that target, since your attack is on cooldown anyway.
It's also trying to be helpful in many ways:
-displays your rage, in case you go tunnel vision on the bar and the surrounding MS/whirlwind cooldown. Experts can just time it right without focusing on the bar anyway
It's also trying to be more clever than most weapon swing addons:
-evaluates the parry weapon swing acceleration. As the precise time of your parry is mangled by lag, a friendly Parry message appears on the bar, indicating that you should look at animation/combat log to time know when you will swing again. Still, it's the best estimate you can get, as far as I know.
-it's trying to detect if you your last white attack isn't a windfury totem/sword spec proc off a yellow attack and act accordingly (treat the extra attack as an instant attack not resetting the swing timer).
-re-evaluates the weapon speed a bit after a hit so see if a speed altering event occured, such as flurry or Dragonspine Trophy proc.
Finally, a somewhat unrelated feature is the nagger, which reminds your in big white letters to do your part in raid and against elite creatures in general:
-tells you to cast battle shout if you have no shout
-tells you to cast commanding shout if you have battle shout from somebody else
Against raid target:
-tells your to help with sunders, for shade, druid/pally tank or simply busy warrior tanks
-tells you to put up demoralizing shout
-tells you to put up thunder clap
Usage:
Use /slam or /slammer to access options.
Thanks to the Chronographer author for an addon structure that did pretty much what I needed.
Disclaimer:
I did not intend to publish this, so it's a bit messy, but enjoy if it suits your needs.