Vadym

Extra User Details is the simple plugin that allows you to add extra fields to the user profile page (e.g. Facebook, Twitter, LinkedIn links etc).
Extra fields can be easily accessed in your templates like a general wordpress author details:
<pre><code><?php the_author_meta('meta_key'); ?>
</code></pre>
Plugin saves fields data in wp_usermeta table. You can add and edit extra fields at plugin options section in backend.

Extra User Details

Took me a bit to get this out, since there is no help online.
I wrote a little function and pasted it into my functions.php:
function extra_user_info() {
		global $current_user;
			get_currentuserinfo();

		echo 'Your extra user info is' . $current_user->PUT_YOU_ID_HERE ;      		

	}

add_action ('NAME_OF_HOOK_WHERE_YOU_WANT_IT', 'extra_user_info', 20);


How to display the correct values in the frontend

Add extra fields to the user profile page, saved in WordPress' native way (in wp_usermeta).

Simple CRM is a WordPress plugin that lets you define custom fields to extend user profiles and it is also a framework for integration with all kind of CRM API webservices. 
Profile Page Addon adds shortcode support to integrate user profile page with your theme. Integrates also with Simple CRM fields.
Plugin sponsored by <a href="http://vivanista.com" rel="nofollow ugc">Vivanista.com</a>

Simple CRM Profile Page Addon

Adds public profile page support to Simple CRM

Extra User Details vs Simple CRM Profile Page Addon