Four days, we came to know that a new project has arrived on SourceForge with the name of Anonymous OS. This was claimed to be registered by famous Anonymous hackers. According to the description, this operating system is based on Ubuntu 11.10 and uses Mate desktop.
So this is my suggestion not to download this Anonymous OS. Never think of give it a try. If you really want to operating system to test the security of websites, download and install Backtrack latest version.