Which libraries or widgets can I use to get such a WEB frontend? (Auvik)

I'm totally new to the Web GUI for apps. I would like to know which libraries or widgets were used to create the following interface

https://demo.us1.my.auvik.com/#entity/root/dashboard

I am mainly interested in the tree diagram part, but the other components that are present on the mage (left menu bar and bottom details), I would like to know who they were built from