The Metasploit Framework is the open source penetration testing framework with the world's largest database of public, tested exploits. The Metasploit Project is an open-source computer security project which provides information about security vulnerabilities and aids in penetration testing.

Download here (Windows Users):

http://www.metasploit.com/releases/framework-3.2.exe


Download here (Linux Users):

http://www.metasploit.com/releases/framework-3.2.tar.gz