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

termel

Simply prevent duplicate submissions by blocking the submit button while submitting

Gravity Forms Prevent Duplicates

Does the job

Simply prevent duplicate submissions by blocking the submit button while submitting

WP Prevent CSS Cache vs Gravity Forms Prevent Duplicates