VERA is a visualization tool for reverse engineer to produce a nice view and made easy to understand of program behavior. The latest version so far is v0.31 and can be download it from here. Setting up this tools probably a bit complicated if you got no experiences. Just follow the instruction manual and you should be fine.
References:
http://www.offensivecomputing.net/?q=node/1687
http://www.pentestit.com/2010/12/23/update-vera-v03/
http://ether.gtisc.gatech.edu/source.html
