You can download Metasploit Framework 4.0 from our software library for free. This PC program is suitable for 32-bit versions of Windows XP/Vista/7/8/10. This free software was originally designed by Metasploit LLC. The program is included in Development Tools. The most popular versions among the software users are 4.0, 3.7 and 3.6. The program's installer files are commonly found as framework-3.4.0.exe, ruby.exe, rubyw.exe or uninst.exe etc.
From the developer:
The Metasploit® Framework is a free, open source penetration testing solution developed by the open source community and Rapid7.
You may want to check out more software, such as Framework Archaeology Free Viewer, Metasploit or Hotfix for Microsoft.NET Framework KB932471, which might be related to Metasploit Framework.