Github is a house of code for companies and individual developers. It is a cloud-based programming project management, version control system, and a-kind-of social network for programmers.
Github allows developers to speed up their development and secures their programs with repositories. It is a very lightweight system which you can clone according to your need into your local machine or organize your files online. A highly popular cloud hosting platform for codes which is used in many top organizations including IBM and PayPal.