Louis

This WordPress Plugin removes the version number from the WordPress front end. This is important for security purposes as hackers will usually try to identify the current version number your site it running in order to take advantage of any security issues associated with that version.
Major features in WP Remove Version Number include:
<ul>
<li>Removes version number from scripts, styles, and rss feed.</li>
<li>No setup required!</li>
</ul>

WP Remove Version Number

License: GPLv2 or later WordPress plugin to remove the version number from the WordPress front end.

George Gkouvousis

Simple, yet effective plugin that once activated, it will eliminate every CSS version tag of WordPress plugins, core & themes.
Bonus: your website will receive a small boost of SEO, you will experience no CSS caching issues anymore and hackers wont be able to recognize your version numbers.
Try its demo <a href="http://apps.8web.gr/demos/wordpress-remove-versions-from-code-plugin/" rel="nofollow ugc">here</a>

No Version Tags

Description: Upon activation, this plugin will automatically eliminate the annoying '?ver=x.x' signs from your perfect code :)

WP Remove Version Number vs No Version Tags