We've added a new website feature called Projects to help teams collaborate on their games. A project can be created with several privacy features so you can use this for public open-source games everyone can participate in, or for your team's secret project. I myself have started a project I intend to develop to demonstrate Leadwerks multiplayer capabilities:
You can add a forum, blog, and downloads section to your project and use it to host files, carry out discussions, and post updates to your team. The project creator can also moderate the content and has the ability to invite and approve new members.
I hope you find this feature useful for team development.