EndNote Basic, formerly known as EndNote Online or EndNote Web, is the online counterpart to EndNote desktop. EndNote Basic is a free version of EndNote. Besides being free, the major advantage of EndNote Basic is that you can access your account from any computer that has an internet connection. With EndNote Basic, it is possible to share libraries with other EndNote Basic users - making collaboration easy. EndNote Basic can also work with EndNote desktop so you can move references between the two.
More information about EndNote Basics may be found at: http://endnote.com/product-details/basic