Open Source Web Application Security Scanner Framework
There's a new version of Arachni which features numerous optimizations, new modules, new plug-ins and a brand new,although experimental,Web user interface (adding support for distributed deployment,parallel scans and basic report management).
Arachni is a high-performance (Open Source) Web Application Security Scanner Framework written in Ruby.
The changelog is too long to recite but if you want to read the full announcement for the new release you can visit:http://trainofthought.segfault.gr/2011/02/13/arachni-v0-2-2-1-is-out/
Project homepage: http://zapotek.github.com/arachni/
GitHub page: https://github.com/Zapotek/arachni
Video Demo: http://vimeo.com