Arachni is a feature-full, modular, high-performance Ruby framework aimed towards helping penetration testers and administrators evaluate the security of web applications.Arachni is smart, it trains itself by learning from the HTTP responses it receives during the audit process.Unlike other scanners, Arachni takes into account the dynamic nature of web applications and can detect changes caused while travelling through the paths of a web application’s cyclomatic complexity.This way attack/input vectors that http://www.blogger.com/img/blank.gifwould otherwise be undetectable by non-humans are seamlessly handled by Arachni.
The main focus of this release has been on distributed deployment and bugfixing.Main additions include the update of the HTML report to include false positive reporting functionality and an updated WebUI with support for multiple Dispatchers.
Download : https://github.com/Zapotek/arachni/
Source: Arachni v.0.2.3 – Open Source Web Application Security Scanner Framework