How To: Download and initialize Git for source control

Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.
GitHub is a provider of Internet hosting for software development and version control using Git.It offers the distributed version control and source code management (SCM) functionality of Git, plus its own features. It provides access control and several collaboration features such as bug tracking, feature requests, task management, continuous integration and wikis for every project.

Go to Git website, then go to the Downloads link and choose your corresponding platform.