"the most comprehensive scientific research tool on the web. With over 370 million scientific items indexed at last count, it allows researchers to search for not only journal content but also scientists' homepages, courseware, pre-print server material, patents and institutional repository and website information. "
Springpad (remember, act, share): like Evernote - a service to put everything in the cloud - this application lets you quickly and easily save ideas and info that you come across everyday. They enhance what you upload with a link and then you access it from the web or your phone.