Louis

This WordPress Plugin prevents the browser from caching your main stylesheet during development. This comes in handy when you have clients and others viewing your work and you don’t want to explain to them that they need to clear their browser’s cache all the time.
Major features in WP Enable WebP include:
<ul>
<li>No Setup Required</li>
<li>Doesn’t touch the database</li>
</ul>

WP Prevent CSS Cache

License: GPLv2 or later WordPress plugin to prevent caching your stylesheet during development

sdesalas

This plugin allows WordPress to block over 95% of spam comments using a time-based hash.
This allows for a minimum sanity check and yet should remove almost all spam comments 
without the need to sign up to any third party APIs.
The plugin has been tested in real world conditions for around 12 months. It will not block 
real comments and it is pretty effective against spam, however it only uses a very simple 
algorithm and for that reason some spam comments may still make it through.

WP Simple SpamCheck

This plugin allows WordPress to block over 95% of spam comments using a time-based hash.

WP Prevent CSS Cache vs WP Simple SpamCheck