EndNote is a commercial reference management software package, used to manage bibliographies and references when writing essays, reports and articles. EndNote's ownership changed hands several times since it was launched in 1989 by Niles & Associates: in 2000 it was acquired by Institute for Scientific Information’s Research Soft Division, part of Thomson Corporation, and in 2016 by Clarivate (then named Clarivate Analytics).
Mendeley is a free reference manager and academic social network that can help you to organise your research, collaborate with others online and discover the latest research:
• Automatically generate bibliographies
• Collaborate easily with other researchers online
• Easily import papers from other research software
• Find relevant papers based on what you are reading
• Access your papers from anywhere online
• Read papers on the go, with our iOS and Android apps
Zotero is a free and open-source reference management software to manage bibliographic data and related research materials (such as PDF files). Notable features include web browser integration, online syncing, generation of in-text citations, footnotes, and bibliographies, an integrated PDF reader and note editor, as well as integration with the word processors Microsoft Word, LibreOffice Writer, and Google Docs. It is developed as a project by the non-profit Corporation for Digital Scholarship. It was originally created at the Center for History and New Media at George Mason University.