I recently helped develop this browser extension called rbutr.
It’s a very handy extension currently available for Chrome that allows people to link related articles to eachother as rebuttals.
So let’s say you are on an article that explains why fish oil is really good for you. If someone has added a rebuttal to that article, you’ll see the notification on the rbutr icon and can click it to see the rebuttal/s. Then you can even see the rebuttals of the rebuttals and so on, in order to gain better objectivity.
It recently received a cool review on Skeptools and you can start using it now.
It is and always will be free!