Sockets
http://socketo.me/
http://reactphp.org/
https://github.com/reactphp/socket
https://github.com/jolicode/php-ar-drone
https://code.google.com/p/phpwebsocket/
https://github.com/varspool/Wrench
https://github.com/lemmingzshadow/php-websocket
http://www.websocket.org/
https://github.com/RickySu/phpsocket.io
http://elephant.io/
*
https://github.com/wisembly/elephant.io