EndNote is just one of many referencing tools available. This page highlights a few free alternatives and online support resources where you can get help using them.
Zotero: It is a free and user-friendly tool designed to help you collect, organize, cite, and share research sources. It supports the addition of PDFs, images, audio, and video files. Users receive 300 MB of free storage, with the option to purchase additional storage if needed.
Link to Download: https://www.zotero.org/download/
Zotero Connector: https://www.zotero.org/download/connectors
Zotfile. Plugin to manage PDF attachments: https://zotfile.com/
Zotero Help: https://www.zotero.org/support/
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Mendeley: Mendeley is both a reference manager and an academic social network. It allows you to create a library of references, cite as you write, and read and annotate PDFs.
Mendley Reference Manager Lite