Litmap Shows the relationships between the articles in your collection in the form of connecting lines which trace the citations for you from reference manager file.

Connected Papers uses a ‘similarity’ algorithm to show paper relationships. This isn’t a citation tree like Litmap. It does give prior and derivative works. Provide information on one key paper into the search box and ‘build a graph’. Generates related papers, including those which don’t have direct citation links to the key paper.