One of the places where you can find Team System-related projects is in the Team System featured group on GotDotNet CodeGallery:
CodeGallery welcomes the new Visual Studio Team System Featured Group, whose initial project members include: the Team Foundation Server Work Item Utility, which enables you to move work items from one Team Project to another and create a link to detailed instructions from the owner. In Team Build Samples, you can find helpful build automation samples for Visual Studio Team Foundation. The group's third project, Sun Screen, aspires to allow Java developers to work in the Visual Studio IDE, enabling mixed development teams to work on the same source and share a methodology through Team System. Teams work better when they work together!