"It's been a long road to 4.0. The first 3.0 release was almost 5 years ago and the first release under the Rapid7 banner was almost 2 years ago. Since then, Metasploit has really spread its wings. When 3.0 was released, it was under a EULA-like license with specific restrictions against using it in commercial products. Over time, the reasons for that decision became less important and the need for more flexibility came to the fore; in 2008, we released Metasploit 3.2 under a 3-clause BSD license. Licensing is definitely not the only place Metasploit's fexibility has increased. Over the last 5 years, we've added support for myriad exploitation techniques, network protocols, automation capabilities, and even user interfaces. The venerable msfweb is gone along with the old gtk-based msfgui. Taking their place are the newer java-based msfgui and armitage, both of which have improved by leaps and bounds since their respective introductions."

Download

http://updates.metasploit.com/data/releases/framework-4.0.0-windows-mini.exe

http://updates.metasploit.com/data/releases/framework-4.0.0-windows-full.exe

http://updates.metasploit.com/data/releases/framework-4.0.0-linux-mini.run

http://updates.metasploit.com/data/releases/framework-4.0.0-linux-full.run

http://updates.metasploit.com/data/releases/framework-4.0.0.tar.bz2

Metasploit 4.0 And Armitage - What's New?