Whenever I read an article that cites a study I like to follow through to try read the original (health & science reporting can be really sensationalist). Very rarely am I able to get access to more than an abstract. I love not only that this extension helps looks for free versions but that they proactively reach out to authors to let them know users want access to their work & use collected info for advocacy.
They do collect information on what content you were looking to access but are very up front about their terms & privacy policy. And it's a student project!
Just installed, excited to see what it finds.
Mashable for iPhone