Is there something like this (or trello), that you can self-host on a site? I appreciate that these sites provide free accounts etc, but I am in an association and we have our own simple site already with no advertising or tracking. It would be nice to be able to collaborate internally. I did set up a wiki on another site a few years ago, but I recall it being a bit of faff to set up (wikis being generally aimed at being open, not private)