GitHub, Inc. is a provider of Internet hosting for software development
and version control using Git. It offers the distributed version control
and source code management functionality of Git, plus its own features
source: https://github.com/
It was commonly used to host open-source projects.
As of January 2020, GitHub reports having over 40 million users and
more than 190 million repositories (including at least 28 million
public repositories). It is the largest source code host as of
April 2020
source: https://en.wikipedia.org/wiki/GitHub