Hi,
In accordance with my BE Project, I found out few of the Resources listed on the webpage - http://www.matlab.nitech.ac.jp/~khpoo/research/ns2.html
Network Simulator (NS-2) Resource Page
Tutorial & Documentation for NS2
Forum & FAQ
TCL/TK
Technical Resources & Books
Trace
Awk
Topology Generator
Traffic Generator
GNUPlot
Queue Simulation for NS-2
QoS for NS-2
Multimedia
Multicasting
Wireless Simulation
Mobiwan
Peer-to-Peer Simulation
TCP/UDP Enhancements for NS-2
Routing
Ant Routing
Video Traces
Add-ons & Extensions
Source Code
* If you have any soucecode to share, please send to me
Etc
Also there are few resources available on NS2 over here - http://ns-2.blogspot.com/
I hope it will help others too :)
Thanks and Regards,
Bhavik Vora