Thanks you all, guys. I have tried Juked, but I don't like it because it shows cooldowns of every nearby players instead of only focused one.
WeakAuras looked hard to configure, so I decided to try NamePlateCooldowns. It is working fine by the moment, I like it. :D
Anyways, I liked Juked, but the problem is the told one above. If you know how to configure it to show only targeted unit cooldowns, it would be good.
Thanks for helping!