Just to prove I'm not dead,
I moved the ActsAsFerret wiki and issue tracker to Github and Lighthouse.
It’s not that I don’t like Redmine any more, but unfortunately it caused me trouble bringing the whole server to a halt every few weeks. I think I could have fixed that somehow but I feel that hosting Redmine isn’t one of my core competences…
Update: Here’s the script I used to import the existing Redmine Tickets into Lighthouse.