From what I can tell, NeedToKnow and TellMeWhen is two very similar addons. TMW uses icons instead of bars though.
But TMW is a real ease to set up. You create a group of icons, right click on one of them, enter the cd/buff/debuff/internal cd or whatnot and then just type in the name of the ability.
And, I managed to create an icon exactly like you wanted using tmw :P
Edit: Adding a screenshot of the shadowfiend icon along with some other icons. The faded ones are of cd and ready to use.
http://i.imgur.com/SdDSz.jpg