If you primarily use an iPad or want mobile accessibility to your library, use the EndNote iOS app for iPad and iPhone.
Store and access your library on a mobile device. With flexible tools for searching, organizing, sharing research, and creating bibliographies, the EndNote app extends your ability to stay on top of cutting edge research and connect with your EndNote library on the go.
EndNote Web is a freely available web-based citation management tool. It allows you to store up to 50,000 references and up to 2 GB of pdfs. it allows you to Collect references by searching online databases or importing your existing collection; Organize and group references in any way that works for you. Then share your groups with colleagues; and Use a plugin to format bibliographies and cite references while you write.