Joost de Valk

Easy contact form, embed it in a post or page by writing the shortcode [wpcf].
Features:
<ul>
<li>Spam protection.</li>
<li>Shows referrer information for the person contacting you.</li>
<li>Option for user to send himself a copy of the message.</li>
</ul>
More info:
<ul>
<li><a href="http://yoast.com/wordpress/enhanced-wordpress-contactform-plugin/" rel="nofollow ugc">Enhanced WordPress Contact Form</a>.</li>
<li>Read more about <a href="http://yoast.com/articles/wordpress-seo/" rel="nofollow ugc">WordPress SEO</a> so you can get the most out of this plugin.</li>
<li>Check out the other <a href="http://yoast.com/wordpress/" rel="nofollow ugc">WordPress plugins</a> by the same author.</li>
</ul>

Enhanced WP Contact Form

Easily add a contact form with spam protection to your pages, and get additional data about your visitors with each e-mail!

Yuichiro ABE

“Contact Form 7 add confirm” can add confirm step to “Contact Form 7”. 
“Contact Form 7 add confirm”に確認画面を追加するプラグインです。
This plug-in is not related to the developer of the “Contact Form 7”. 
このプラグインの作者はContact Form 7プラグイン開発元とは関係ありません、ご注意下さい。

Contact Form 7 add confirm

どうしてもというときに使わせていただいています。
ありがとうございます！

It's Japanese style!

"Contact Form 7 add confirm" can add confirm step to "Contact Form 7".

Enhanced WP Contact Form vs Contact Form 7 add confirm