acts_as_activity_loggedI needed a plugin which add modified_at, modified_by, created_at and created_by to my models. In general a kind of activity logging. I found Jamie van Dyke Plugin acts_as_activity_logged which was nearly what I'm was searching for. Unfortunately Jamie's SVN wasn't accessible and the whole plugin seems to be not well maintained. After some research I found the source code and it wasn't that sophisticated as I thought. I had some ideas which would improve that plugin and would make more sense at all, so I decided to give it a try.