Patrick Lai

XLogin enhances the WordPress login page (usually wp-login.php) to 
allow users to authenticate with the following external services:
<ul>
<li>Facebook Login</li>
<li>Google Sign-In</li>
<li>Yahoo! OAuth</li>
</ul>
These services can be enabled or disabled individually. XLogin adds a 
button to the WordPress login page for each enabled service. Clicking 
the button sends the browser to the corresponding external service 
where the user can authorize the WordPress site to access their 
information. Having been granted access to, for example, the Facebook 
public profile of a user, XLogin retrieves their email address to 
find a matching WordPress user to complete the login process.
XLogin also maintains a list of external aliases. They are additional 
email addresses for mapping to WordPress users. Some scenarios where 
external aliases can be handy include:
<ol>
<li>
A user’s email address in his WordPress profile is not used in any 
of the external services. For example, a corporate WordPress site 
may mandate the use of company email addresses in user 
profiles. If a user has for example his Gmail address in the 
external alias list, they can still nevertheless sign in Google.
</li>
<li>
A WordPress user account is shared by a group of actual 
users. With XLogin it is not necessary to have the users share a 
single password. Instead just register their email addresses (as 
known by the external services) as external aliases; it becomes a 
simple matter to add and remove user.
</li>
</ol>
XLogin has the option to restrict an external service to only users with 
external aliases. This allows tight control on who can use external 
services to login.
A user’s profile in WordPress and in the external service may be 
different. Email address is one, and display name (or its component 
family and given names) is another. XLogin offers the option to import 
the external profile information into the current session. The imported 
display name will be tagged with the external service name. For 
example, if a user has display name ‘John Doe’ in WordPress, but is 
known as ‘Johnny D’ in his Facebook account, then he would be 
displayed as ‘Johnny D (Facebook)’ (instead of ‘John Doe’) in his 
WordPress session when he logs in with Facebook.
Finally XLogin has the notion of ‘guest’ user. When an email address 
provided by an external service does not correspond to a specific 
WordPress user, XLogin will proceed with a guest WordPress user 
configured for the service. There are plugins that control access to 
content based on user roles; a site can combine such with XLogin to 
control what is visible to guests. Note that guest WordPress users 
should have minimal privileges. XLogin has safeguards to ensure, for 
example, that a guest cannot edit posts. It also filters out guest’s 
permission to access the dashboard or to update their own profile.

XLogin

Login to WordPress with external services like Facebook, Google, and Yahoo.

MikeIrvine

This is special plugin which helps your WordPress site to easily create sitewise XML sitemap and ping Google, Bing, Yahoo and Ask.com to index your WordPress site or blog. This plugin generates XML sitemap following sitemap.org Sitemap protocol to help search engines like Google, Yahoo, MSN to better understand and index your blog. The Sitemap protocol enables you to provide details about your pages to search engines, and we encourage its use.
The XML sitemap created using this plugin satisfies completely with Sitemap.org protocol which says
The Sitemap must:
*Begin with an opening tag and end with a closing tag. 
*Specify the namespace (protocol standard) within the tag. 
*Include a entry for each URL, as a parent XML tag. 
*Include a child entry for each parent tag. 
All other tags are optional. Support for these optional tags may vary among search engines. Refer to each search engine’s documentation for details. 
Also, all URLs in a Sitemap must be from a single host, such as www.example.com or store.example.com.
With such a sitemap, it’s much easier for the crawlers to see the complete structure of your site and retrieve it more efficiently. The plugin supports all kinds of WordPress generated pages as well as custom URLs. Additionally it notifies all major search engines every time you create a post about the new content.
It will do exactly what it’s supposed to do – providing a complete XML sitemap for Google, Yahoo, MSN, ASK and other search engines. It will not break your site, slow it down or annoy you. Guaranteed!
<blockquote>
If you like the plugin, feel free to <a href="https://www.ijunkey.com/rate" rel="nofollow ugc">Rate it 5 star</a> or <a href="https://ijunkey.com/buymecoffee" rel="nofollow ugc">Buy me a coffee</a>.
</blockquote>
Thanks a lot! 🙂
<h3>License</h3>
Good news, this plugin is free for everyone! Since it’s released under the GPL, you can use it free of charge on your personal or commercial blog.
<h3>Translations</h3>
The plugin comes with various translations, please refer to the <a href="https://codex.wordpress.org/Installing_WordPress_in_Your_Language" title="Installing WordPress in Your Language" rel="nofollow ugc">WordPress Codex</a> for more information about activating the translation. If you want to help to translate the plugin to your language, please have a look at the sitemap.pot file which contains all definitions and may be used with a <a href="http://www.gnu.org/software/gettext/" rel="nofollow ugc">gettext</a>.

Google Sitemaps XML

This is special plugin which will generate a special XML sitemap to help Google, Yahoo, Ask and other search engines to ndex your site or blog.

XLogin vs Google Sitemaps XML