OWASP’s WebScarab 

I’ve been using WebScarab for a while now, and thought I’d share it with those who aren’t familiar with it.  It’s a web security analysis application written in Java.  It has numerous included plug-ins with the standard install, including a spider, parameter fuzzer, session analyzer, HTTP/HTTPS interception/mangling, and much more.  OWASP once again proves their skill in creating a extremely useful tool.  Check it out!