For using the following tools some expertise is required.
Gephi is the leading visualization and exploration software for all kinds of graphs and networks. Gephi is open-source and free.
NodeXL Basic is a free, open-source template for Microsoft Excel 2007, 2010, 2013 and 2016 that makes it easy to explorenetwork graphs.
Graph Commons is a collaborative platform for making, analyzing and publishing network maps. It empowers people and organizations to transform their data into interactive maps and untangle complex relations that impact them and their communities.