Git is a distributed version control system much like Mercurial and BitKeeper (Commercial) and unlike CVS and Subversion. Git is distributed, that means the complete source repository is distributed across developer machines and server machines, build machines, etc. Most of the commit and diff actions happens locally so they blistering fast compared to SVN’s over-the-network commits and diffs.
I was in search of a Flash Builder plugin for Git and the search was quiet easy: EGit
Installation also pretty easy. Here are the steps.
Go to the download page of Egit : http://www.eclipse.org/egit/download/
Copy the URL of main site from page (which is http://download.eclipse.org/egit/updates)
Go to Flash Builder, click Help >> Install New Software
Add the copied url to the Window which opens (as seen below)
Make the selections as shown in picture (you dont need to install the source). Complete the wizard and Flash Builder will take some time to install the plaug-in. When the installation is done it will ask you to restart Eclipse/Flash Builder, which you should do.
After restart, go to Window >> Other views. You will be able to find the Git Repositories view from the list.
This is it, and now you can continue and clone an existing Flash/Flex GIT repository and start working.