They seem to have native API's available for Java, Erlang, and .Net; I haven't used any of those, but I used Pika (Python-based) and it worked nicely for me.
RabbitMQ is accessed mostly by using the AMQP protocol 0.9.1 so if you have a client in your language for that version then you are good to go. Check the links in @blackdawg comment.
There are some plugins which offer other protocols like STOMP or MQTT
I'm talking about more of a platform for rabbitmq heroku style. I'm aware of cloud foundry's built in stuff, but what about something stand alone? Sorry for not being clearer.
Have you taken a look at http://www.rabbitmq.com/clients.html or http://www.rabbitmq.com/devtools.html?
They seem to have native API's available for Java, Erlang, and .Net; I haven't used any of those, but I used Pika (Python-based) and it worked nicely for me.