MyBB Community Forums

I'm looking for a mod that would automatically hide threads that haven't received a reply/update in the last X number of days. You can see an example of it here: http://elitistjerks.com/f75/

At the bottom they can "unhide" the threads that have been hidden.

A closest to what you are looking for is this: http://mods.mybb.com/view/automove

It'll automatically closes and/or moves threads from one forum to another after the threads become a certain age. Not moving to another forum when it not gets a reply within time frame though.