This is an official PlotSquared addon which creates holograms by the sign location for plots. If you only want to have Holograms, you will need to disable signs in the PlotSquared configuration.
Please be aware of the following known bugs before downloading:
- Holograms sometimes fail to update when the plot changes state
(There are no known performance issues, just visibility issues)
If you would like me to support another plot plugin, please let me know.