Looking for better visualization plug-in for Epics, User Stories, and User Story Map

A user story map arranges user stories into a useful model to help understand the functionality of the system, identify holes and omissions in your backlog, and effectively plan holistic releases that delivery value to users and business with each release.  

But, when you use Excel, PPT or even Jira, then the whole thing looks just too darn complicated.  Any good visualization plug-in out there to take content from excel or Jira and visualize it for anyone to navigate better a user story map?