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