Some of the following links contain some local institutional information. However, most of the information provided is generic and will help you compare the features and functionality of EndNote, RefWorks, Zotero, Mendeley, Papers and other Reference & Citation Management tools/services.
Bibliographic management | Bamboo DiRT. (2014). Retrieved July 25, 2017, from http://dirtdirectory.org/categories/bibliographic-management.
Provides an extensive, though dated, list of citation & reference management tools. Descriptions at the list level are short and not analytical. However, the site does provide more extensive information, including comments and reviews.
Citation managers (2015) - UW Madison Libraries. Retrieved July 25, 2017 from http://www.library.wisc.edu/citation-managers/comparison.html .
This site compares EndNote (desktop version), EndNote Online, Mendeley and Zotero (the Firefox based PBM).
Choosing a citation manager: EndNote, Mendeley, RefWorks, Zotero (2016). Retrieved July 25, 2017 from http://libguides.tacoma.uw.edu/content.php?pid=73462&sid=5297103 This site also includes EndNote Web.
Citation management tools: Overview. (2017). Retrieved July 25, 2017 from http://guides.library.upenn.edu/citationmgmt .
This site provides a brief tabular comparison of the following personal bibliographic management systems: RefWorks, Flow (document centric version of RefWorks) EndNote, Zotero, Papers and Mendeley.
Compare EndNote versions (2018). Retrieved from https://researchsoftware.com/software/bibliography/endnote/compare-endnote-versions . Find out what's new in EndNote X8 and compare EndNote version X4 -- X8.
Manage citations with Zotero, Mendeley & EndNote. (2017). Retrieved July 25, 2017 from http://guides.library.pdx.edu/managecitations .
This site provides a table comparing the products given in the title, plus EndNote Web [EndNote Online]. Additionally, this site includes a well done video comparing the pros and cons of Zotero and Mendeley.
Overview of citation software at MIT: Managing your references: Overview (2017). Retrieved July 25, 2017 from http://libguides.mit.edu/content.php?pid=55486&sid=427307 .
This site includes Zotero (the Firefox based PBM), EndNote and Mendeley.
Research management and citation. (2016). Retrieved July 25, 2017 from http://library.law.yale.edu/research/research-management-and-citation .
This site provides a comparison table including the following personal bibliographic management tools: Evernote (open source), Mendeley, Zotero (the Firefox based PBM), EndNoteWeb and RefWorks.
Wikipedia contributors.Comparison of reference management software. (2017). Retrieved July 25, 2017 from http://en.wikipedia.org/wiki/Comparison_of_reference_management_software .