I'd like to note that GitLab not only is doing an awesome job with the FSF, but they are also themselves embracing free software tools for their internal work.

They're switching from Slack to Mattermost[0], from Google Analytics to Piwik[1], looking for a free software commenting software to replace Disqus[2].

[0]: https://about.gitlab.com/2015/08/18/gitlab-loves-mattermost/

[1]: https://about.gitlab.com/2015/11/27/gitlab-switches-to-piwik...

[2]: https://about.gitlab.com/2015/05/20/gitlab-gitorious-free-so...