The Metasploit Framework is released under a BSD-style license. See COPYING for more details.
The latest version of this software is available from: https://docs.metasploit.com/docs/using-metasploit/getting-started/nightly-installers.html
You can find documentation on Metasploit and how to use it at: https://docs.metasploit.com/
Information about setting up a development environment can be found at: https://docs.metasploit.com/docs/development/get-started/setting-up-a-metasploit-development-environment.html
Our bug and feature request tracker can be found at: https://github.com/rapid7/metasploit-framework/issues
New bugs and feature requests should be directed to: https://r-7.co/MSF-BUGv1
API documentation for writing modules can be found at: https://docs.metasploit.com/api/
Questions and suggestions can be sent to: Freenode IRC channel or e-mail the metasploit-hackers mailing list
Generally, you should use the free installer, which contains all of the dependencies and will get you up and running with a few clicks. See the Dev Environment Setup if you'd like to deal with dependencies on your own.
Metasploit can do all sorts of things. The first thing you'll want to do
is start msfconsole, but after that, you'll probably be best served by
reading the basics of using Metasploit
or Metasploit Unleashed.
See the Dev Environment Setup guide on GitHub, which will walk you through the whole process from installing all the dependencies, to cloning the repository, and finally to submitting a pull request. For slightly more information, see Contributing.