JomInvite can be used as an invite or recommend component. At the backend, JomInvite can be configured to set the following fields: * Set the number of recipient fields * CC the web site admin * Set the default invite subject * Set the default invite message

AJAX Recommend is a module for Joomla! that allows visitors to recommend your site to their friends by e-mail. Using AJAX technology, the whole process is performed without need for page refresh, making it very quick and user friendly. The module is powerful but simple to install and use. 

Let your visitors bring others to your site for a drink or other event. This component allows users to invite other users for a meeting, a drink, a church picnic, carpooling or any other kind of event. Integrates seemlessly into your site's CSS. Delivered in English, Dutch and French. Other languages easily addable through the standard methods of Joomla. Both Free and Commercial versions available.