I have worked with creating Tableau reports and being the internal support person for reporting needs for an organization; both for supporting users using Tableau, and for assistance in extracting reports from the existing data structure.

I’ve worked with MySQL and PostgreSQL; often directly with SQL queries.

Elasticsearch and Kibana are other tools I have used.
At one organization the search feature was ported over from solr to elasticsearch, and I assisted in expanding the indexing definitions.

I have done somethings with network graphs.
A bit of Python network graph data visualization, Kibana, and Gephi.

D3.js is a javascript visualization tool that has been a common go to visualization option, especially with a tool like C3.js that creates more abstracted charting abilities on top of the low level D3.js capabilities.