Along with EndNote 20, there are a number of other reference management programs with the functionality to store, read, annotate, and cite literature throughout the research and writing process. Mendeley and Zotero are two popular alternatives to EndNote 20, details of which are briefly included in the following pages.
When choosing reference management software remember, there's no ultimate right or wrong decision. Each software program will have its own set of features and functions, and naturally, all will come with their own pros and cons.
Ultimately, you'll need to consider your own circumstances and/or research needs, and choose the reference manager which fits best with your personal or collaborative workflows.