Tammy Hart

This plugin adds a page to the admin under Users that includes a form for users to send email invitations to their friends to register at your site. You can also add the form to the front end of your site with the <code>invite_friends()</code> template tag or the <code>[invite_friends]</code> shortcode.
IMPORTANT: This plugin will not allow invited friends to register unless you have registration turned on.
<h4>Features</h4>
<ul>
<li>Invite multiple friends at one time</li>
<li>Customize the email subject and message that is sent</li>
<li>Customize the URL to redirect a user to after they register</li>
<li>Store successful registered users in the inviter’s user meta data</li>
<li>Store the inviter in the new user’s meta data</li>
</ul>

Invite Friends to Register

Use this plugin to allow users to invite their friends to register on your site.

Simon Wheatley

!!THIS PLUGIN IS BETA, PLEASE LET ME KNOW ANY ISSUES!!
This plugin requires PHP5 (see Other Notes > PHP4 for more).
Allows you to upload a CSV file of names, emails and usernames to invite a lot of people to join your blog.
Plugin initially produced on behalf of <a href="http://www.getambition.com/" rel="nofollow ugc">Ambition</a> a project to help UK Arts Organisations work with IT and digital media.
Is this plugin lacking a feature you want? I’m happy to accept offers of feature sponsorship: <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a> and we can discuss your ideas.
Any issues: <a href="http://www.simonwheatley.co.uk/contact-me/" rel="nofollow ugc">contact me</a>.
<h3>PHP4</h3>
Many of my plugin now require at least PHP5. I know that WordPress officially supports PHP4, but I don’t. PHP4 is a mess and makes coding a lot less efficient, and when you’re releasing stuff for free these things matter. PHP5 has been out for several years now and is fully production ready, as well as being naturally more secure and performant.
If you’re still running PHP4, I strongly suggest you talk to your hosting company about upgrading your servers. All reputable hosting companies should offer PHP5 as well as PHP4.
Right, that’s it. Grump over. 😉

Invite en Masse

Allows you to upload a CSV file of names, emails and usernames to invite a lot of people to join your blog.

Invite Friends to Register vs Invite en Masse