Both projects are open source components for Delphi and both projects have the same project coordinator. That's more than nothing and I wonder what more projects need to have in common so that they may live under the same organization.
My motivation to consider this was that I hope for easier project management, e.g. when I grant Delphi developers that work in my company write access to the projects. And I was hoping to attract, with the popularity of Virtual TreeView, some new users to the Windows Ribbon Framework for Delphi project, that would submit issues and pull request. I don't think I am able to maintain both projects alone in my spare time in a satisfying way.