krazykoder

Freedom Permalinks can help you to change permalinks to any format you want. 
Update slug structure, change domains, remove/add slashes or add extensions (.html, .php or anything you want) etc.
<pre><code>PS. While this gives you freedom to play with permalinks, you should know that you have to make those link structures work with your themes yourself.
</code></pre>
For example if your theme is installed on subdomain1.domain.com, changing permalink to subdomain2.domain.com will break the existing links and you have to move your theme manually to subdomain2.domain.com to make it work.
<pre><code>Things you must know before trying this plugin:
1. It's best suited for custom/smaller themes.
2. Always create backup of your database before trying this plugin.

Examples:
Some permalink examples to just give you some idea to what we can do with "Freedom Permalinks".
Permalink : http://subdomain-anydomain2.com/blog/%post_id%/%post_slug%
Becomes : http://subdomain-anydomain2.com/blog/23/this-is-smaple-page-post

Permalink : http://subdomain.com/blog/%post_id%/%post_slug%.html
Becomes : http://subdomain.com/blog/23/this-is-smaple-page-post.html

Permalink : http://subdomain.com/blog/%post_slug%.html
Becomes : http://subdomain.com/blog/this-is-smaple-page-post.html

Permalink : http://subdomain.com/blog/%post_category%/%post_slug%.html
Becomes : http://subdomain.com/blog/health/this-is-smaple-page-post.html

Permalink : http://nes.subdomain.com/news/%post_category%/%post_slug%-%post_id%
Becomes : http://nes.subdomain.com/news/mobile/some-ceo-retired-23
</code></pre>

Freedom Permalinks

Change permalinks for standard or custom post types while using any domain name you want.

FasterThemes

Quick Whois WordPress Plugin Shows whois information of the provided domain name. You can use Widget in the sidebar or you can also use Shortcode in the pages/posts.
<a href="http://whois.fasterthemes.com/" rel="nofollow ugc">DEMO of Quick Whois plugin</a>
Features:
<ul>
<li>You can use this plugin in your sidebar by dragging and dropping “Quick Whois” Widget.</li>
<li>You can use this in any specific page/post by putting shortcode [quick_whois].</li>
<li>This plugin converts your website into a whois data provider website in a few seconds !</li>
</ul>
<h3>License and Copyrights for Resources used in this plugin</h3>
i) We have used phpwhois.org php script from this website http://www.phpwhois.org Copyright which is a free software and we are allowed to redistribute it and/or 
modify it under the terms of the GNU General Public License v2.
<pre><code>For any help you can mail us at support[at]fasterthemes.com
</code></pre>

Quick Whois

Quick Whois Plugin Shows Whois information of the provided domain name.  You can do this using Widget/Shortcode.

Freedom Permalinks vs Quick Whois