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Gitea for code, docs as code with Woodpecker for CI for test tasks and build/deploy tasks. Also integrated with Weblate for translation.

Kanboard for more complex task management with a hook server for custom automations.

GitLab internal instance and GitLab hosted.

I like it, though we probably could do permission automation better on the internal instance. The team who run the hosted stuff have this perfect.

Depends on your needs. Do you only need a remote repo and issues + pull requests? Gitea all the way. Do you also do project management (sprints, milestones etc) and want CI/CD and integration with things like k8s etc? Gitlab (Premium)

Phabricator at my company. It's surprisingly good. The main downsides are no built in CI, it's written in PHP, and it's been abandoned. There is a community project to take over but too early to see if it will succeed.

I would probably use self hosted Gitlab or Gitea/Gogs if I was choosing now.