Yesterday was the movement known of the alleged early version of the operating system of Anonymous, promising tools that every aspiring hackers would like to have available in order to join the group.
However, as it turned out, contained the operating trojans themselves are Anonymous denied in a statement that Twitter was for their own software. The result was the Sourceforge website that hosted the file to finally decide to download it.
However this does not mean the end of Anonymous OS, since the website said that can only come back later for origins. The official announcement of the Sourceforge you can read here.