mohanjith

Code Master

Helps you make the site available via https and http with no effort. Just install and activate 
and say good bye to SSL errors without forcing users to access via http or https only.
<h3>Notes & Credits</h3>
This plugin is written by <a href="http://mohanjith.com/" rel="nofollow ugc">S H Mohanjith</a>.
You should follow us on Twitter <a href="http://twitter.com/codemasteroy" rel="nofollow ugc">here</a>.

WordPress SSL

Have been using this plugin to resolve SSL errors for quite a while.  Has not failed and works just as advertised.  Ensures all links to resources are on the correct protocol.

Has worked well for a long period

Seamlessly map URLs to SSL if the site is accessed via SSL.

David Gregg

CCS-HTTPS is a simple plugin that allows you to identify which pages should have HTTPS enforced. All other pages will have HTTP enforced. 
This plug-in will not interfere with or override any of the built-in WordPress options related to forcing HTTPS for the login and admin pages.

CCS-HTTPS

A simple plugin that allows you to identify which pages should have HTTPS enforced. All other pages will have HTTP enforced.

WordPress SSL vs CCS-HTTPS