I would start looking at gephi: https://gephi.org and sigma.js for visualization. To run influence or social network analysis I would look at R's igraph: http://igraph.org/r/ or spark graphx: http://spark.apache.org/docs/latest/graphx-programming-guide... . For the graph database. neo4j , elasticsearch or the open source graph database created by the uk intelligence service: https://github.com/gchq/Gaffer . Another interesting project is mazerunner that integrates spark graphx and neo4j together : https://neo4j.com/developer/apache-spark/#mazerunner