Grabber is a web application scanner. Basically it detects some kind of vulnerabilities in your website. Grabber is simple, not fast but portable and really adaptable.
Maltego is a unique platform developed to deliver a clear threat picture to the environment that an organization owns and operates. Maltego’s unique advantage is to demonstrate the complexity and severity of single points of failure as well as trust relationships that exist currently within the scope of your infrastructure.
Powerfuzzer is a highly automated and fully customizable web fuzzer (HTTP protocol based application fuzzer) based on many other Open Source fuzzers available and information gathered from numerous security resources and websites. It was designed to be user friendly, modern, effective and working.