Once you have created a Mendeley account, you can also download the desktop version. Mendeley allows you to organize your library in either the web version or the desktop version, and then sync the two from your desktop. Navigation of your library is similar within both versions of Mendeley.
The free web version allows access to the networking features available in Mendeley as well as your library. Click on the tabs at the top of the page to access each of the following features: The "Dashboard" allows you to keep track of recent activity in your "Groups", and allows you to modify or update your profile. "My Library" can stand alone, or be synced to your desktop Mendeley library. The Mendeley collection of "Papers" includes documents added to the web libraries of all users. Mendeley "Groups" allows you to join groups of Mendeley users with similar interests. And Mendeley allows you to create a contact list within Mendeley in the "People" tab.