CodeCanyon - PHP Social Network Platform v2.6 | 779
Our PHP Social Network script is similar with Twitter, allowing you to keep in touch with your friends, @mention them, create #hashtags, send messages (tweets) in real-time, receive automatic notifications upon new mentions and new messages, the script is responsive too (native application style on mobile devices), modern (metro) clean design, and so much more...
DEMO:
http://codecanyon.net/item/php-social-network-platform/3740004