I might not know of any Add-on Packs, but here the best set-up I use.
Dominos: For Display Purposes, you can hide the resst of your actionbars and make a CD only bar with a minimum amount of icons. (Assuming you dont click) >.<
http://www.curse.com/addons/wow/dominos
Doom Cooldown Pulse: To track your important CD's its a must have for PvP. It'll pulse the CD for 2 secs iin the middle of screen.
http://www.curse.com/addons/wow/doomcooldownpulse
Afflicted 3: For tracking other classes CD's such as counterspell, Death Grip, Kick Etc
http://www.curse.com/addons/wow/afflicted3
DOT timer: For tracking the remaining durations for your own + the enemies DOT's
http://www.curse.com/addons/wow/do-timer
These are just the basics, there are others such as powa auras and gladius and such. If you need something specific just let me know.
Cheers - Hope This helps a little