theslink2000

This plugin doesn’t do anything on the surface but if you call the get_user_role() function then you can achieve one of two results.
Function
Returns the role of the specified user.
Usage
Parameters
$user_id 
(string)(optional) ‘username’
Return Values
(string) If no $user_id is specified in the function call the function will return the role of the currently logged in user, otherwise the role of the specified user will be returned.
Examples
$role = get_user_role(“admin”);
This will return “administrator”.
Notes
This plugin may call the following global variables:
$current_user 
$wp_roles 
$wpdb
This plugin is designed to work with any correctly made custom roles.

Get User Role

A simple plugin that add's the get_user_role() function to your site.

scribu

AppThemes

With the current WordPress administration area, the only way to add existing users to a certain blog is by entering their usernames, one by one. It’s very time consuming.
With this plugin, you can do it in bulk, by using the familiar “Change role to…” dropdown:
<ol>
<li>Go to WP Admin -> Users.</li>
<li>Click the “Entire Network” link.</li>
<li>Check the users you want to add.</li>
<li>Choose the new role from the dropdown.</li>
<li>Press “Change”.</li>
</ol>
Note that you have to be a super-admin to be able to do this.

User Management Tools

Allows super-admins to quickly add users to a particular blog in a multisite installation.

Get User Role vs User Management Tools