I am a privacy researcher working on a book about the subject.
I have been making heavy usage of both the Panama and Paradise Papers and although I have had many years of experience using relational databases, these sources have exceeded my current tool's abilities, especially in visualization.
I also need to build relationships out of my own FOIA and public records requests, this focus is mostly on the relationship between government entities and the vendors of surveillance technologies.
I found Neo4j through a link at the ICIJ's Panama Papers download page.
It looks to be a robust community, thank god, because I may be in over my head.
Thanks in advance for any future help I may require.