Mario Giannini

MGMC is a plugin that helps customize and control user login, registration, and content. You can customize appearance by doing things like hiding the admin bar. It provides shortcodes to place a login form on any page or post as well as to display content based on whether the user is logged in or not. A widget is also provided to display user information or links such as ‘Login’ or ‘Register’. It also provides an option for hiding the wp-login.php page to help avoid brute force attacks of that page.
Note that this control is primarily designed for site admins who will be running a site to disperse information, and not one where a community of users interact with the site.
MGMC also provides a means to share or validate users between sites with a validation key. The user must exist in both sites and be identifyable by email address. When a visitor logs into SiteA, that site can provide a link to SiteB with a special key so that when the user clicks it they will jump to SiteB and be logged in automatically. This ability can be extended to non-WordPress sites.
<ul>
<li>Change appearance by hiding Admin bar or dashboard</li>
<li>Widget for login links</li>
<li>Optional ‘Terms of use’ support</li>
<li>Shortcodes for login, register, activate, and reset password forms</li>
<li>EMail activation option</li>
<li>Disable users option</li>
</ul>
No changes are made to .htaccess or other WordPress files, so in the event of a catastrophic failure, you can just delete the MGMC plugin folder or all of it’s settings in your MySQL database.

MG Member Control

Implement various controls to customize membership, access, and appearance.

Cliff Seal

Simply put: this plugin gives the Editor role access to edit “theme options”, which includes:
<ul>
<li>Appearance > Widgets</li>
<li>Appearance > Menus</li>
<li>Appearance > Customize if they are supported by the current theme</li>
<li>Appearance > Background</li>
<li>Appearance > Header</li>
</ul>
Instead of adding this capability by hand on each client site, just install and activate this plugin—it keeps your <code>functions.php</code> file clean, and keeps this type of functionality where it belongs.
The capability is added to the role once (on plugin activation) and removed when the plugin is deactivated.

Editor Theme Options

Allow editors to access theme options in the Appearance menu.

MG Member Control vs Editor Theme Options