Link collectionSome of the links are outdated, I know.
Firedoor: Firewall + QOS script
Linux Advanced Networking from 1999-09-30 , so little outdated, but still useful
IP QOS Page General information about QOS, very technical.
2 scripts to manage the bandwidth.
iperf: Tool to measure bandwith and to generate traffic.
Linux QOS Page 1 page with general information (kernel configuration, example)
Patches for tc :
http://diffserv.sourceforge.net/ : diffentiated services (only for 2.2.x kernel)
http://home.dkik.dk/users/worm/wipl-wrr/ : WRR and WIPL