I am mirroring several websites with resources that are useful
These mirrors are made with the permission of the website owners to
protect against the danger of websites being discontinued or being
down.
Original Website is here
Mirror Website is here
Example of using Kac is here (This had been a chapter of my book, it seemed better to put it with the program rather than in a book).
Website for the the database of modular data for twisted quantum doubles, by Angus Gruen as a research project under the direction of Scott Morrison .
Original Website is here
Mirror Website is here
See also this manuscript 1808.05060 which is a shorter version of the thesis.