Fastmover

A simple drop down selection meta box on a post edit page will allow you to specify default, HTTP or HTTPS. Default will allow both HTTP and HTTPS protocols.

Protocol Enforcer

This plugin allows a user to specify a post to only be viewed over HTTP or HTTPS.

florianluce

With WP htaccess Optimize, you can easily optimize the performance of your site by configuring your htaccess in bit clicks
optimisation available:
<ul>
<li>Time zone selection</li>
<li>Prevents indexing of folders without index.php</li>
<li>Disable the server signature</li>
<li>Block Sensitive Files</li>
<li>Protect WP-includes</li>
<li>Protect author link</li>
<li>Block author scans</li>
<li>Enabling the tracking of symbolic links</li>
<li>Comment spam</li>
<li>Protection against file injections</li>
<li>Various protections ( XSS, clickjacking and MIME-Type sniffing )</li>
<li>Disable the hotlinking of your pictures</li>
<li>Redirect without WWW</li>
<li>Redirect http to HTTPS</li>
<li>Caching files in the browser</li>
<li>Disabled headers ETags</li>
<li>Compress static files</li>
</ul>

WP htaccess Optimize (beta)

simply configure your htaccess to optimize your site!

Protocol Enforcer vs WP htaccess Optimize (beta)