HostStats allows you to look on your NetFlow data from a different point of view - it calculates statistics about network traffic of each individual host (IP address) in the network.
It's not a typical NfSen plugin - besides usual frontend and backend plugins it also runs a daemon (it performs all the data processing).
Please, report issues to email@example.com.
Great project. One thing to note of a problem I ran into. When installed I was getting the following error "nfsen: Plugin: Error while running plugin 'HostStats': ERROR in Socket Creation: Connection refused". Come to find out default 'localhost' was pointed to "::1" which apparently was breaking connectivity some how. I changed my hosts file to point 'localhost' to only 127.0.0.1 and this fixed all the issues.