This OpenScience initiative is great! Keep the good work!
I'd like to brainstorm a bit on how to select a tool to use. In order to achieve an Open Everything status, the tools/services used should be Open Source also. For example, git is an free and open-source tool, but GitHub is a non-paid proprietary service. GitLab on the other hand uses only open-source software on their services. An open-source alternative to Slack is Riot.