Comment Expirator allows to schedule closing of comments, trackbacks and pingbacks on an individual basis at a date or time of your choice. It can be activated on any post type that allows comments. This is good for preventing spam on old posts. The plugin lets you chose if trackbacks and pingbacks should also be closed at the same time.

Comment Expirator

Comment Expirator let's you close comments, pingbacks and trackbacks on your posts, pages and custom post types on an individual basis.

Andrew Skochelias

Pavlo Kotula

WordPress changelog – logs any uploads, updates, installations/uninstallations, activations/deactivations of themes, plugins and WordPress core. 
It could be helpful to easily find out the moment when something went wrong with your site and quickly fix the issue.
The plugin logs such actions: 
* Theme installation 
* Theme update 
* Theme activation 
* Theme deactivation 
* Theme removal 
* Plugin installation 
* Plugin update 
* Plugin activation 
* Plugin deactivation 
* Plugin removal 
* Translation update 
* WordPress update 
* WordPress reinstall

WordPress Changelog

It is a very handy plugin in a case when there a lot of people are working on the project. So you can track when and what was updated or installed. And with help of this plugin, you can quickly find out what caused any issues.

Useful plugin

WordPress changelog - logs any uploads, updates, installations/uninstallations, activations/deactivations of themes, plugins and WordPress core.

Comment Expirator vs WordPress Changelog