3D visualisation for molecules
There multiple options to visualise 3D molecules in a web browser. There is a nice list of the available libraries here: https://en.m.wikipedia.org/wiki/List_of_molecular_graphics_systems
Currently, a few tutorials use the JSmol (http://wiki.jmol.org/index.php/JSmol) package which works but a little bit outdated.
There are a few alternatives for the future which even have python interface: