Scholia is an amazing interface into scholarly information held inside id WikiData. It includes information about authors, articles and a very large chunk of the citation graph. You can see an article pate here: https://tools.wmflabs.org/scholia/work/Q24595162. The tool extracts topic information on articles, shows cites and citing articles (and how many citations each of these articles has)
Thoughtworks have created a tool to allow you to build your own “Digital Radar”. The one linked to here was put together a few years ago by people at the BMJ to look at the technology landscape in STM publishing (There are some really interesting things in there in some interesting locations).