From: http://alattw.blogspot.com/2007/07/ns2-releated-tools.html
other NS2 related articles: http://alattw.blogspot.com/search/label/ns-2

Thanks for listing Our Jtrana:)

[Analyzer, Trace]
NAM
Network Animator
http://www.isi.edu/nsnam/nam/index.html
Wikipage
http://www.nsnam.org/wiki/index.php/Main_Page

NANS - Network Analyzer for Network Simulator ns2
http://www.geocities.com/ankurjain009/projects.htm
NANS is the utility which brings all these features into one and from now
on wards, strives to eliminate all the problem associated with it.

TRACEGRAPH - Network Simulator NS-2 trace files analyzer
http://www.geocities.com/tracegraph/
Trace graph is a free network trace files analyzer developed for network simulator ns-2 trace processing.
Trace graph can support any trace format if converted to its own or ns-2 trace format.
Trace graph runs under Windows, Linux, UNIX and MAC OS systems.
Trace converter processes traces over 80x faster and is available to buy.

jTrana
https://sourceforge.net/projects/jtrana/
Jtrana is a Java-based NS-2 wireless simulation trace analyzer. Its input is an
NS2 wireless trace, and its output is a graph or data-set that can be plotted
with other tools such as Gnuplot.Any problem,
plz visit:http://ns2trana.googlepages.com
It's from Weiwei's Study (http://hi.baidu.com/vvfang).

[Scenarios Generator]
NSG2
http://wushoupong.googlepages.com/nsg
NS2 Scenarios Generator 2(NSG2) is a JAVA based ns2 scenarios generator.
Since NSG2 is written by JAVA language, you can run NSG on any platform. NSG2
is capable of generating both wired and wireless TCL scripts for ns2. This tool provides wireless node function. Below this does not have.

NS WorkBench - Graphical User Interface For Network Simulator
http://www.mnlab.cs.depaul.edu/projects/nsbench/
nsBench makes NS-2 simulation development and analysis faster and easier for
students and researchers without losing the flexibility or expressiveness gained
by writing a script.

The Network Simulator ns-2: Topology Generation
http://www.isi.edu/nsnam/ns/ns-topogen.html

The Network Simulator ns-2: Scenario Generation
http://www.isi.edu/nsnam/ns/ns-scengeneration.html

Mobility Generator program for NS-2
http://externe.emt.inrs.ca/users/nuevo/NSmobgenerator.htm