For online option use EndNote Web instead.
EndNote is reference management software with features to—
Zotero is a free reference management system where you can collect, manage, cite, and share research. You can use it to store references, highlight and annotate webpages, and collaborate by using groups through Zotero's website. All your references will be saved to the Zotero server. Zotero works with word processors (e.g. MS Word, Openoffice, and Word Perfect) so you can insert citations into research papers and create bibliographies from your saved citations.
zoterobib Enter a URL, ISBN, DOI, arXiv ID, or title
Mendeley is a free reference manager and academic social network that serves as an information system to support research. It can help you discover, access, manage and share references and research data, collaborate with others online, showcase your latest research, find funding, and identify career opportunities.
Link your Mendeley account to your Elsevier account, if you have one already.