Similar to TrufiGCD, but more flexable
Quick Start
To open the options window, type /cst or /castspelltrack into your chat and hit enter
if you want to show more drop list options, go to {wowinstallpath}\_retail_Interface\AddOns\CastSpellTrack, open UnitConfig.lua file, change any “show=false" to "show=true", then it will show in drop list
https://github.com/dftty/CastSpellTrack You can report bug here or github.