Our code repository on github serves as a public repository for our product codes. The code available here can be forked and worked upon by the public. If there are any improvements, just send us a pull request to integrate the changes back into the main-line code.
We use the popular 'git flow' workflow processes in-house. Actual code used in products can be found in the master branch, while all development work happens on the development branch. More information on the process.