Qlik Sense D3 Visualisation Example Library
Here are some great examples of D3 inside of Qlik Sense:
This is the github repository:
https://github.com/skokenes/Qlik-Sense-D3-Visualization-Library
This is the Qlik Branch project page:
http://branch.qlik.com/projects/showthread.php?389-D3-Visualization-Library
Worth taking a look whenever you need a new way to visualise some existing data.