Improve existing Graph Explorer.
Also allow to show and expand incoming links.
Requirements:
Knowledge of JavaScript and CSS.
Repo:
https://gerrit.wikimedia.org/r/#/admin/projects/wikidata/query/gui
File to modify:
GraphResultBrowserNodeBrowser.js
How to set it up:
https://github.com/wikimedia/wikidata-query-gui/blob/master/README.md