Floating-Tools is a smart addition to CKEditor that gives your users a floating toolbar whenever they select some text!
A very effective and intuitive way to make text-formating tasks (and a lot of other things) easier!
Every time you select some text there is a toolbar displayed. Right there, at your mouse-cursor. The toolbar is smart enough to always keep your selected text visible. Yes, it loves to help you and never wants to distract you. If it still does not behave in some situation, then please let me know. I will have a word with it...
Oh, and you should also check out the live-demo at the bottom of this page! Its really cool to see the toolbar in action ;-)
For more information visit the official plugin page here