What are your favorite safari plugins/mods?
Or if you use another browser, what makes you choose it? Pros and cons?
I would like to hear what everyone has to say out of curiosity, and because I like to be able to have control and customization of my browsing experience.
I have many chrome extensions installed on my PC for example :P
In particular I want to know about safari plugins for instapaper/evernote if possible, but please, concentrate the thread on the original questions, that's what I'm most interested in