The best version control system is Git, which has a great merge tool. The developers can use it locally without the internet connection. It is the open source distributed system that handles everything from small document to large projects in an efficient way.
Git admits teams of people to work on the same code at the same time without stepping on each other’s toes. It is widespread, where most of the developers have some experience of using Git. Therefore it makes a good medium for the exchange of and collaboration on the code.
Once you understand the working of Git, then branching is very simple. There are many git servers are available for you and some of them allow you to generate private repositories for free. A repository is a directory, where Git initialized to start version controlling your files.
Companies Using Git System
The most popular companies including Google, Facebook, Netflix, Android, Microsoft, Twitter, Linkedin, Linux and much more are using Git version control system. Subversion, CVS, Perforce and ClearCase have outclassed software configuration management (SCM) tools of Git system.
You may Download Git system here