Free as in freedom and not in price.
I have been looking into CyberPanel, http://froxlor.org and ISPconfig for last 2 days.
I eliminated Cyberpanel because it doesn’t use ngninx or Apache and most of the people except either one of these.
Built-in file manager is always an issue, but it can be eliminated with net2ftp or something similar. And there are a couple of options for webmail like Rainloop etc.
Billing module if available is a plus.
Which one do you think replaces cpanel the best?