Demo version of mardyr2 app hosted on shinyapps.io (for details refer to https://github.com/nicoblokker/mardyr2).
This software is affiliated with the following publication (PDF):
Lapesa, G., Blessing, A., Blokker, N., Dayanik, E., Haunss, S., Kuhn, J., Pado, S.: DEbateNet-mig15: Tracing the 2015 Immigration Debate in Germany Over Time. In: Proceedings of LREC. , Marseille, France (2020).
See here for further information regarding the licensing.