Topics Auto Closer for Kunena is a plugin that can lock or remove topics with no answers during scheduled period of time. The plugin provides three actions: lock the topic, move the topic to trash or completely remove the topic from database. You can set up hours to run, choose the period of days after which the action will be perfomred and select categories where the plugin should work. Also it can send messages to e-mail and inform subscribers about performed action on the topic.