There are plenty of open source projects out in the wild that are built on a variety of platforms. Github, BitBucket and Mercurial. Open source projects rely on these services because they are able to version control their code. Version control has some of the following benefits:

Archive successive versions of source-controlled items
Maintain detailed history and version information
Collaborate on projects
Recover from accidental deletions or errors

Deploying version control within an organization can a help staff produce efficient and stable code. It allows everyone to view, comment, and edit code before it hits production servers. Many times when people write code, normally the code works well on their system and maybe on a few of their test systems, but in an environment that has hundreds or thousands of nodes it is important to fully test every potential system your code will touch. This leads to the another important component of writing code Documentation.

Documentation is something that is lacking in most I.T. departments. Technicians deploying systems usually feel pressed to roll out a service or finish a project so they can move onto the next item on their agenda. Versioning will allow technicians to document every change. Co-workers can follow the logic that went into developing a code base. Documentation can also help save you when having to restore or update services. I.T. professionals move at a lightening pace and it helps if you store helpful hints for yourself or team. For those co-workers who need to motivation of why to document, Rich Trouton, gave a presentation at Mactech Conference about documentation that is worth a read.

Open source projects that utilize these tools allow anyone who is interested in a project to provide and enhance code. For example, the Autopkg project, is an automated preparation of software to be deployed to OS X clients. This project was created because there is a need to automate software updates for applications. The creators of the tool started a repository that users can pull updates for certain applications. However, they set up the application framework which enables anyone to create "recipes" and contribute to the project. Autopkg code lives all on Github, which allows for collaboration on a global scale.

Because of the popularity of Autopkg another open source project, based upon Github and version control, is Autopkgr. This open source project is a GUI wrapper for Autopkg. Due to version control the creators of Autopkgr are able to allow anyone to help modify the code to help benefit the community.

Lastly if you are looking to set up a code sync, the Client Platform Engineering (CPE) team at Facebook, has opened sourced some of their code sync tools. In addition users can use some of these other tools to help with versioning and checking code:

These are not the only or definitive list of versioning, editing, or checking code but just a start.

Here are some questions I have for you:

Do you version control your code?
What do you use to version control your code?
How to implement version control?
If you are currently not using version control do you see yourself implementing version control?

Just some food for thought.