Otto Kekäläinen

Viljami Kuosmanen

Onni Hakala

This plugin is useful e.g. if you have a wildcard SSL/TLS certificate for server but not for each site.
If the site is normally at say <code>http://example.org/</code> and you want to have the admin area https protected, but you don’t have a SSL/TLS certificate so that <code>https://example.org/</code> would work, you can define another domain for secure connections.
For example instead of <code>https://example.org/wp-login.php</code> or <code>https://example.org/wp-admin/</code> the user is redirected to <code>https://example.seravo.com/wp-login.php</code> or <code>https://example.seravo.com/wp-admin/</code>.
This plugin works with both normal WordPress installations and WordPress Network installation and is compatible with the WordPress MU Domain Mapping plugin.
The code is optimized to be fast and does not for example do any database lookups or use cookies.
This plugin is made by <a href="https://seravo.com/" rel="nofollow ugc">Seravo Oy</a>, which specializes in open source support services and among others is the only company in Finland to provide <a href="https://seravo.com/" rel="nofollow ugc">WordPress Premium Hosting</a>.
Source available at https://github.com/Seravo/wp-https-domain-alias

HTTPS Domain Alias

Enable your site to have a different domains for HTTP and HTTPS.

peterarends

Redirects you to the proper URL of the website. In case of stumbling upon a working alias.
Normally (depending on your settings or control panel) http://misterwebsite.nl (an alias of www.mrwebsite.nl) just works, but it should be redirected to <a href="http://www.mrwebsite.nl" title="MrWebsite" rel="nofollow ugc">http://www.mrwebsite.nl</a>. 
The same goes for http://mrwebsite.nl (it should be with www. instead without), https://www.mrwebsite.nl (it should be http instead of https) and all other aliases.
Before WordPress 3 this just worked out of the box. But it does not anymore.

Proper Redirect

Redirects you to the proper URL of the website. In case of stumbling upon a working alias.

HTTPS Domain Alias vs Proper Redirect