Open source communities are people. Participants, contributors, and users are some of the roles that we already know and we have acknowledged some of them in the existing CHAOSS [Community Health Analytics for Open Source Software] work. CHAOSS is the leading OSS community with the mission of learning and sharing insights about OSS health. The very existence of public profiles developing software with whom you can interact, make decisions together, and discuss next steps is important up to the point that the alternative is to have close governance communities with low interaction and lack of initiative. Some OSS foundations and OSS projects are indeed stating the importance of these other artifacts as key to a good open governance policy (as for instance the Four Opens by the Open Infra Foundation) and having those discussions in a transparent, public, and open way is part of their culture. How can this be translated into action? Collaboration. And how can we measure collaboration? This talk aims at providing an initial set of existing use cases where collaboration is used as a healthy community metric, an initial list of them related to the collaboration concept, and some existing software you can use to visualize them.