Quartz
Quartz is a modular approach to a casting bar addon. An overview of (hopefully most of) the modules:
*Player
The core of Quartz is lightweight implementation of a standard casting bar, with configurable size, text and icon positioning, and colors. 
*Target/Focus
Implementation of target and focus casting bars in similar fashion to the player cast bar. 
*Buffs
Display of target and focus buffs and debuffs as duration bars. 
*Flight
Hooks into FlightMap or InFlight to display the current flight progress on your casting bar. 
*Global Cooldown
Displays a tiny spark-bar to show your Global Cooldown near the cast bar. Helpful for those who'd rather not squint at their action bars to see when they can cast again. 
*Interrupt
Changes the color and text of your casting bar to help show that your cast has been interrupted (and show who interrupted it). 
*Latency
Displays the amount of time spent between cast send and start events, in the form of a bar at the end of your casting bar, with optional text that displays the actual duration of the lag. This helps in canceling casts when they will not actually be interrupted, especially for users with consistently high pings. 
*Mirror
Shows the 'basic' timers such as breath and feign death, as well as some 'odd' ones such as party invite time, resurrect timeout, and arena game start, and a framework for injecting custom timers into the bars. 
*Range
Recolors the casting bar when your cast target moves out of range mid-cast. 
*Swing
Displays a swing timer for your melee weapon as well as hunter autoshot. 
*Timer
Allows for creating custom timers displayed on the mirror bars. 
*Tradeskill Merge
Merges multiple casts of the same tradeskill item into one big cast bar. 
Use /quartz to bring up the configuration menu.
        
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Posted Aug 27, 2019Thank you so much for the update for Classic! For some reason, I cannot get the target castbar nor the mirror to appear.
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Posted Aug 27, 2019In reply to Johnny_Utah71:
I am having the same issue. Let me know if you find a fix
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Posted Aug 28, 2019In reply to Johnny_Utah71:
WoW Classic does not allow anything but personal cast bars, so no target.
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Posted Aug 28, 2019In reply to nevcairiel:
Nev, thank you so much for keeping this addon updated and all the support. I've been using this addon for a LONG time and it's wonderful. Before you updated it for classic, I used ClassicCastBars. Oddly enough, this one provides target castbar but no player castbar. Here is a link to the addon:
https://www.curseforge.com/wow/addons/classiccastbars
Have a great day.
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Posted Aug 27, 2019Thank you for the Classic update!
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Posted Aug 26, 2019Hi are you planning on updating this for classic?
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Posted Aug 25, 2019third or fourth this please.
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Posted Aug 12, 2019I too would like this!
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Posted Aug 12, 2019need this very nice addon in classic, too =)
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Posted Aug 10, 2019second and even third this
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Posted Aug 9, 2019Please update this for Classic!
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Posted Jul 23, 2019Love this addon so it took me a long time to figure out it was actually causing me significant casting latency. RIP
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Posted Jun 24, 2019https://ibb.co/xMCQTYZ
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Posted Jun 10, 2019Please enable spec profiles! 10/10 would love <3 Thank you!
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Posted May 19, 2019I am crossing my fingers and hoping this will get a classic port - thanks ;)
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Posted Aug 8, 2019In reply to amey0:
Me too !
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Posted Mar 13, 2019Some kind of bug with the tradeskill merge. The timer keeps resetting everytime it has crafted 1 out of x number of the same item
example: I could try and make tons of runecloth and the timer say it will take 5 minutes and some seconds, and then it crafts one and the countdown timer resets back to the full duration and the total progress bar resets to start again.
Anyone else having this issue?
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Posted Mar 16, 2019In reply to MrThingy:
Yes me too, but tbh with all the rest of the addon working fine i don't really care :), it's a minor issue some day or another someone will look into it
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Posted Mar 22, 2019In reply to MrThingy:
To fix it, edit file Quartz\modules\Tradeskill.lua:
goto line 99 and replace
with
goto line 107 and replace
with
That's it.
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Posted Mar 24, 2019In reply to Forge_User_76654639:
Careful, he's a hero.