Raihanul Islam

Connect your Twitter account to this plugin and the widget will display your latest tweets on your site. This plugin is compatible with the new Twitter API 1.1 and provides full OAuth authentication via the WordPress admin area.
<h4>Usages</h4>
<ol>
<li>At first, Install and activate the plugin.</li>
<li>Go to <code>Dashboard >> Appearance >> Widgets</code> and you will find a widget <code>Latest Tweets</code> click on it and select at which Widget Area you want to show it.</li>
<li>Fill Widget detail and click <code>Save</code>.</li>
<li>You need Consumer Key, Consumer Secret, Access Token and Access Token Secret.</li>
</ol>
To get this create an account at <a href="https://apps.twitter.com/app/new" rel="nofollow ugc">Twitter Developers</a>.

Awesome Latest Tweets

A widget that displays your latest tweets from your twitter account using Twitter API 1.1

WP Chill

Silkalns

Cristian Raiber

A very useful plugin for everyone using WordPress. Adds reCaptcha security to the WordPress login form, register form and comment form. This plugin could help your blog get rid of a lot of spam comments or brute-force attacks.
Nothing gets passed it if the reCaptcha doesn’t validate.
A few notes about the plugin:
<ul>
<li>Supports audio or image captcha types</li>
<li>Can generate the reCaptcha image / audio type in a number of predefined languages</li>
<li>Adds reCaptcha protection to the WordPress login form</li>
<li>Adds reCaptcha protection to the WordPress register form</li>
<li>Adds reCaptcha protection to the WordPress comment form</li>
<li>Adds reCaptcha protection to the WordPress recover password form</li>
</ul>

Uber reCaptcha

This plugin adds the reCaptcha form to the WordPress login form, recover password form, register form and comment form.

Awesome Latest Tweets vs Uber reCaptcha