Erlang

Used in combination with RabbitMQ, MochiWeb, and custom websocket/long-polling/HTTP1.1-streaming API to create a real-time web API to be used with AJAX, supporting HTTP and HTTPS simultaneously.

Custom RabbitMQ modification to route messages/events on geographic proximity.

WebSockets

Server-side push and keepalive for mobile-based client network monitoring and communication, Erlang-based

MQTT

Server-side push and keepalive for mobile-based client network monitoring and communication, Erlang-based