Public Issue Tracking?

I’m new to gitlab and I see that the ability to make wikis and issue public doesn’t yet exist. There is a suggestion to create it at Improving Open Development for Everyone but it has only a few votes at the moment.

Which free 3rd party issue trackers do you all recommend for handling user issues? Preferably suggestions should work with the gitlab Custom Issue Tracker service, but I don’t suppose I require that. I would prefer not to create a separate project just to track issues and show a wiki.