Miaz Akemapa

Regnomail is a plugin to customize your registration form. It disable sending email confirmation during user registration to admin and to user itself.
Regnomail Features:
<ul>
<li>Disable email confirmation to user during registration</li>
<li>Disable new user email notification to admin</li>
<li>Disable user change password notification (lost password) to admin</li>
<li>Show password input form, so user can input their own password</li>
<li>Show First and Last name input form</li>
<li>Change login / registration logo image.</li>
</ul>
Read more details here: 
<a href="http://www.vnetware.com/regnomail" rel="nofollow ugc">http://www.vnetware.com/regnomail</a>

Regnomail

Disable new user registration confirmation email.

fergbrain

Forces new users to register additional fields. Available fields are:
<ul>
<li>First Name</li>
<li>Last Name</li>
<li>Nickname</li>
<li>AIM screen name</li>
<li>Yahoo IM screen name</li>
<li>Jabber/Google Talk user name</li>
</ul>

Force User Field Registration

Forces new users to register additional fields (such as first name and last name). Note: WordPress 2.5 or higher is definite required due to new erro …

Regnomail vs Force User Field Registration