Download of Mantra-OS-13.04-amd64.iso (Mantra-OS-13.04-amd64.iso ( external link: SF.net): 1,818,490,880 bytes) will begin shortly. If not so, click link on the left.
A Ubuntu based Linux OS built for application, penetration testing and secure computing.
Please check the files page for amd64 build and i386.