DSmidge

<p>When WP is opened through HTTPS, all local absolute links in content are replaced from HTTP to HTTPS.<br />
Additional hosts can be specified through admin interface (like graph.facebook.com which works on HTTP and on HTTPS).<br />
Options HOME and SITEURL shuld be changed to HTTPS when enabling this plugin.</p>


HTTP to HTTPS link changer by Eyga.net

When WP is opened through HTTPS, all local absolute links in content are replaced from HTTP to HTTPS.

neoslab

<p>Simple HTTPS automatically detects if your website run properly over HTTPS and fix your website accordingly without any extra useless line of code. Your website will move to SSL within few clicks. This plugin also allow you to enable HTTP Strict Transport Security for your website.</p>
<h3>License</h3>
<p>Good news, this plugin is free for everyone! Since it’s released under the GPL, you can use it free of charge on your personal or commercial site.</p>


Simple HTTPS

Correct your SSL/HTTPS issue within few clicks and enable HTTP Strict Transport Security for your website.

HTTP to HTTPS link changer by Eyga.net vs Simple HTTPS