Those top the list, easy to use. I'm fond of RequestPolicy, it's the same as NoScript from the user POV: Decide whether or not you want to render the page's attempts to fetch outside resources. Take back an inch of control over what your computer does without you.
I'm in the USA, we just passed a law encouraging ISPs to pimp us out to the highest bidder. Controlling opt-in pages isn't enough anymore, so I added TrackMeNot, a noise generator.