None do as far as I know. Want to control the bandwidth? Here is a free way:
Linux + poptop + freeradius + pppd patched with radius and mppe + kernel patched with mppe, and set up with bandwidth shaper and cryptographic options + wonder shaper + mysql + apache + php + dialup admin (dialup admin is tricky to install, no doc, just a hint use clear text passwords for the database).
Wonder shaper is just a script to tell kernel how much bandwidth to give the ppp link.
Have to play with ip-up to call wshaper script; Or make your own bandwidth control script. *Requires a bit of coding/hacking
This is what I love about linux guys. "Oh, just use a+b+c+d+e+f+g+h+i+j+k, with the 0.56 beta L's, and it should work fine". look for the howto on lartc and set up a simple 486 box for traffic control. I have one I could mail you, but shipping would be more than the cost of the hardware.
I'm using a Linksys WRT54GS with 3rd party frimware (Sveasoft Satori) which allows far more control than factory frimware, including QoS.
A number of other 3rd party firmware builds exist for these routers as well, each with varying levels of control and fuctionality.
Check the forums at http://www.linksysinfo.org for more info on this.