OPNsense is a fork of pfSense, which in turn is a fork of the FreeBSD firewall software m0n0wall. pfSense took what made m0n0wall so good and dialed it up further to create an excellent, robust ...
I've heard the question asked a lot in windows/networking forums, for an internet sharing application under windows to do banddith throttling for certain clients, the only one I've seen is Sygate's ...