arend

Use this plugin to hide admin menu items like Posts, Comments, Users, etc 
This makes it easier for your clients to navigate WordPress, no distractions, leave only those options that are required.
<h3>Usage</h3>
<ol>
<li>Select which menu entries you want to hide in Settings->Clean Admin UI</li>
<li>Refresh page to see effect</li>
</ol>

Clean Admin UI

Easy Wordpress Menu, Remove menu items from the admin menu

Henrique Mouta

jpargana

sandrof

Tiago Machado

Using Slider CAPTCHA, you can replace or add a CAPTCHA to your WordPress forms. By default, Slider CAPTCHA will add a CAPTCHA to your templates’ comment form. You can also add sliders to the Registration form, Password Recovery form and the Login form.
Besides, you can use the <code>slider_captcha()</code> function to insert a Slider CAPTCHA wherever you want, and fully costumize it.
With our brand new Settings page, you can now fully custumize every Slider on your WordPress installation and live preview the result. In the upcoming version, you will be able to create your own slider. At the moment, if you want to create your own custom slider you should use the <code>slider_captcha()</code>. Check the FAQ for more info.
Current possible Slider CAPTCHA locations:
<ul>
<li>Comments page</li>
<li>Login page</li>
<li>Registration page</li>
<li>Lost Password page</li>
<li>Custom localization</li>
<li>Contact Form 7</li>
<li>MailPress</li>
</ul>

Slider CAPTCHA

Slider CAPTCHA is a WordPress plugin that will allow you to replace or add a CAPTCHA field to any WordPress form.

Clean Admin UI vs Slider CAPTCHA