Socialengine

SocialEngine is a PHP-based social network platform that lets you create a social network on your website. Right out of the box, your social network will offer nearly all of the features found on today's wildly popular social networks. Unlike other social network apps, you are given absolute control over the appearance and structure of your social network. SocialEngine is the only script that truly offers you the opportunity for viral growth. Give your users simplicity and ease of use rather than a mound of features. Add on features as you see fit, including blogs, groups, photo and video albums, messaging, search, browse, subnetworks, spam protection, invite-only features, comments and more. SocialEngine is the only script that lets you define custom privacy levels for your users. SocialEngine is also the only 100% customizable script available, with a template file for every single page on your network. Don't go with the cookie-cutter design of other products. Be unique!