DSmidge

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

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.

phikai

Forces your entire site to ALWAYS use HTTPS
Please help by reporting any bugs/feature request at the link below.
Bugs:
<ul>
<li>Report at: <a href="https://github.com/phikai/wordpress-force-https/issues" rel="nofollow ugc">Github Issue Tracker</a></li>
</ul>
Questions/Comments:
<ul>
<li>http://www.kaiarmstrong.com/contact/</li>
</ul>

WordPress Force HTTPS

Forces your entire site to ALWAYS use HTTPS

HTTP to HTTPS link changer by Eyga.net vs WordPress Force HTTPS