Download link for Network Simulator-2

NS2 is open source. Free downloading ns2 can be done using the following link

http://www.isi.edu/nsnam/ns/ns-build.html

 

NS2 manual can be downloaded from the following link

http://www.isi.edu/nsnam/ns/ns-documentation.html

 

NS2 tutorial can be downloaded from the following link

http://www.isi.edu/nsnam/ns/tutorial/