Sometimes called "reference management software," a citation manager is a type of software that helps you to save, organize, and share research and citations online. Citation managers can be integrated with your web browser to allow you to easily save information about articles, books, and other resources that you discover online, in databases, and in library catalogs.
Image borrowed from Gradzette, "Citation and Organization," 12/2/2013
There are many citation managers to choose from. Which one is for you? See how they compare: