Take a look at this comparison table to help you choose the reference management system that best suits your needs. Now with added monkeys!
This is my favorite research tool right now. I love how you can type in a search term and it will find papers, then you can click ‘download’ and it will use your university library to pull the paper down to your computer. It makes research so neat and easy. You can highlight in the cube, and find and automatically download the papers that are referenced there.